Snopes it!

Snopes it! :)
Remember before passing on information to check to make sure it's accurate. Spreading misinformation can be problematic (sometimes even dangerous). Snopes is a great tool in first defense against a lot of that. Here is the snopes on a few misde-"meme"-ers ;)
http://www.snopes.com/crime/prevent/rape.asp

http://www.snopes.com/food/warnings/butter.asp

http://www.snopes.com/crime/warnings/handle.asp

http://www.snopes.com/crime/warnings/eggthrow.asp

 http://www.snopes.com/crime/warnings/mirror.asp

Another one going around, with dangerous consequences is the peroxide one. The new one going around has a lot longer list but with some seriously twisted advice (like bathing with it) http://www.snopes.com/medical/homecure/peroxide.asp

http://www.snopes.com/politics/gasoline/e15.asp