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What are blacklisted words?

Published in Content Moderation 4 mins read

Blacklisted words are specific terms or phrases that are prohibited from use, often within digital communication platforms, to prevent undesirable outcomes such as spam, fraud, or the spread of inappropriate content. Their primary purpose is to filter out messages or content that violates guidelines, regulations, or acceptable usage policies.

Why Are Words Blacklisted?

Words and phrases are blacklisted for various reasons, primarily to maintain safety, legality, and a positive user experience.

Prevention of Spam and Fraud

A key reason for blacklisting words is to combat unsolicited and potentially harmful messages. For instance, some mobile carriers specifically block certain words to prevent spam messages from reaching their customers. If a blacklisted word is present anywhere within the message body, the SMS communication will fail to deliver. This measure helps protect consumers from unwanted solicitations, phishing attempts, and other fraudulent activities.

Content Moderation and Compliance

Blacklisted words are also crucial for content moderation, ensuring that platforms remain compliant with legal standards and ethical guidelines. This includes filtering:

  • Profanity and Hate Speech: To maintain a respectful environment and prevent the spread of offensive content.
  • Illegal Activities: Terms associated with illegal drugs, firearms, violence, or other illicit activities.
  • Sensitive Information: Certain financial or health-related terms might be restricted to prevent misinformation or scams, especially in regulated industries.

Where Are Blacklisted Words Encountered?

Blacklisted words are employed across a wide range of digital communication channels and systems:

  • SMS Messaging: As noted, mobile carriers use them to filter out spam and unwanted commercial messages.
  • Email Services: Spam filters heavily rely on blacklists to divert suspicious emails to junk folders, protecting inboxes from phishing, malware, and unsolicited advertisements.
  • Social Media Platforms: Content moderation systems use blacklists to identify and remove posts, comments, or profiles that violate community standards, promoting a safer online environment.
  • Search Engines: Algorithms may filter out results containing blacklisted terms to prevent access to illegal or inappropriate content.
  • Customer Service & Chatbots: To prevent automated systems from engaging in inappropriate conversations or disseminating misinformation.

Impact of Using Blacklisted Words

The consequences of using blacklisted words can vary depending on the platform and context:

  • Message Failure: As seen with SMS, messages containing blacklisted words may not be delivered at all.
  • Content Removal: Posts, comments, or even entire accounts on social media can be flagged, removed, or suspended.
  • Reduced Deliverability: Emails might end up in spam folders, and marketing messages may not reach their intended audience.
  • Legal Repercussions: In severe cases, particularly concerning illegal activities or threats, the use of blacklisted terms could lead to legal action.

Common Categories of Blacklisted Words

While specific lists are often proprietary and constantly updated, blacklisted words generally fall into several categories based on their intended misuse:

Category Purpose of Blacklisting Example Contexts
Spam/Marketing Prevent unsolicited commercial messages, scams "Free money," "win now," "urgent," "limited time offer"
Fraud/Scam Block phishing attempts, illicit financial schemes "Verify account," "bank transfer," "loan approved"
Offensive/Hate Speech Maintain respectful communication, prevent discrimination Profanity, derogatory terms, discriminatory language
Illegal Activities Prevent promotion or coordination of illegal acts Terms related to illicit drugs, weapons, illegal services
Adult/Explicit Filter inappropriate content for general audiences Sexually explicit terms, suggestive phrases

Best Practices to Avoid Blacklisted Words

To ensure your messages and content are successfully delivered and comply with platform guidelines, consider these best practices:

  • Review Content Carefully: Before sending, always re-read your messages to identify any words that might be problematic.
  • Use Clear, Direct Language: Avoid overly aggressive marketing jargon, excessive capitalization, or unusual characters that can trigger spam filters.
  • Understand Platform Guidelines: Familiarize yourself with the terms of service and content policies of the platforms you use.
  • Test Messages: If possible, send test messages to various recipients or services to check for deliverability issues.
  • Employ Alternative Phrasing: Rephrase sentences to convey your message without using sensitive or common blacklisted terms. For instance, instead of "free money," you might say "complimentary bonus" if appropriate and compliant.

By understanding what blacklisted words are and why they exist, users and businesses can better navigate digital communication landscapes, ensuring their messages are both effective and compliant.