-If there's a thread you don't want people to read, don't keep replying to it. It only bumps it back to the top of the "today's threads" list which is the first place many people look on GC.
-If you say something bitchy, even if your letters are not in your screen name, people can search for all your posts. If you have posted in your fraternity or sorority's forum, and either stated or have a screen name that gives away your location, people will be able to figure out what group you are in and what chapter.
-If you come to a message board dedicated to Greek Life and never make any posts about any aspect of Greek Life, or mention it, people will probably think you're not quite legit. If all you ever post about is this or that consumer product or movie or TV show, people will probably realize you're using a form of spam called "stealth marketing."
Thank you, drive through.
{Edited for clarity}