We at Why Not have one major rule: Respect your fellow posters. It seems some people don't quite know all of what that might entail, so let me put it into more direct wording:
Read the original post and follow any instructions. Games have their own rules and so everyone is expected to follow those. Please respect the intent of the thread by playing along according to what's been asked in the thread. For example, if it's the "Person Above You" game, then you're expected to say something about the poster above you.
Simple enough. Go about your merry way now. ^^