Alot of people are adding people and sending them messages: "Hey man, I like your inventory.. check mine out :<link> - Do not press on it!! its a virus, or it can do something really bad to your computer or to you. Don't risk it, report, block, and delete that person and you will be fine, trust me! -Goku SteelSeries

Its a new thing that's suddenly going around. I honestly don't understand why its happening, guess someone's a sadist. Be careful out there, it can be you or me or your best friends that can send these messages. Especially the "WTF Dude" thing. So be very careful when someone messages you with a link.