Okay kids, it's time for Online Manners, an oxymoron if there ever was one.
First, LOL. You are NOT. EVER. to write LOL without first laughing. Out loud. And ratcheting up the ante, you better have rug burns on your forehead, elbows and hands after writing ROFLOL. And finally, WTF. Tsk, tsk. The Internet, particularly the social sites, should be considered a large living room with people of both genders and every race. Unless you use WTF in casual conversation, even around your mother or father, wife, girlfriend, boyfriend, priest, or Queen Elizabeth, then you shouldn't use it. Ever. If you do, someone close to you should wash your mouth out with soap.
Perhaps Queen Elizabeth, for instance.
Another pet peeve is when people want to make a point, so they make each word a sentence. Like for instance, 'I. Hate. My. iPAD.' Use complete sentences! What? I did? I. Am. So. Sorry.
If you saw a movie that wasn't up to your high standards, you may state that in a review of course, but come on! You're so brave behind the keyboard. How would you speak to the actor/writer/composer/producer in person? Invisible people have feelings too.
Easy up on the all caps too. What? I did? I. AM. SO. SORRY.
And finally, give the exclamation point a rest. We get it. Really. You mean it. We know.