Many patterns can be used to trick users… I’m not opening those posts just in case. Tutorials like this could be great (like the WTF is series on youtube), but I distrust the forums that much rn. These are entirely new with no user interaction.
Thinking of it, even Facebook has similar problems. Once I noticed I had (I think) subscribed to artists (music etc.) and some time in the future I looked at my subscriptions and none of it seemed OK or legit. Apparently users create groups, grow the userbase, then fully swap the group content. Either to promote sales (like imagine selling that group 5000 users and making it a group that sells gold watches), or to spread malware, or worse. This forum has the same problems, but to the forum mods the things I post should be obvious / known already. It’s not like I’m spreading new exploits. Users don’t know though.