One of the recent outbursts of this kind of situation occured last night when I saw tons of my friends fall for the trick after visiting a webpage that claimed that if you "added this code to your address bar and hit enter, the dislike button on Facebook would be activated." That is bull sh*t.
If Facebook MADE AN OFFICIAL DISLIKE BUTTON, why the hell would they have you go to an external, non-affiliated website and have you paste an anonymous script into your browser? How dumb can you get? I mean come on.
Welp, sorry for that rant... I just had to say it.