How is this allowed?

[yesnt]

putting an ad up for finding like minded people isnt harassing or "abuse" others

Please, context matters. When you COPE with your SA by shoving sex ads into everyone's face, you are abusing people for your personal gratification. We can not decide to read it or not since it is listed in public space. I personally did not consent to this when I signed up to a 13+ game.

shut up about it
[...]
your own fault

Freedom of speech, sorry. If you don't want to hear other's criticism, then don't post your sex stuff in public and don't engage in this thread. Your own fault.