Watch out. People are getting hacked from a certain hacker that has hacked tons of people all over steam and has told all of the friends that he has hacked. he's done it to me but i luckily didn't click it. and he's sent the link to Gunslinger and sadly Gunslinger got hacked. He sends a message saying or something similar to this "hey! i just found out about the new left4dead addons and news. click this link. It brings you to a steam looking website and tells you to log in. So watch out, if your friend sends this to you. its not your friend. its hacker