There have been numerous threads about this subject and there are a number of known regular posters that do this.

It is very bad poker etiquette and (IMHO) shows how good/bad the player is but it is not "illegal".

That said, recognize who these players are and go from there. Know their range and what they do and you will generally do ok.

My advice is to chill and just try to enjoy the interaction and camaraderie with the significant amount of good people on this site.

Otherwise, you are giving yourself too much stress over very little value. Cheers.