What action is NOT a guideline to prevent spam?

Using unsubscribe links in email messages is actually a recommended practice for managing unwanted emails and reducing spam. By utilizing these links, users can opt-out of mailing lists from which they no longer wish to receive communications. This action aligns with standard practices aimed at enhancing users' control over their inboxes.

On the other hand, avoiding giving your email ID to unnecessary sites, not using sites that access email contact lists, and using long email IDs with numbers and underscores are all methods that can help prevent spam. By being judicious about sharing email addresses and opting for email addresses that may be less recognizable to potential spammers, users can mitigate the influx of unsolicited emails effectively.