Internet meme edition:
1) Apostrophes before every s. Learn the language!
2) The comma ellipses.
3) Saw this one the other day, and while it may have just been a typo, I want to head it off at the pass: the semi colon as a time differentiator. 03;02;55 (three days, two minutes, 55 seconds) Just because some countries like to get the decimal and comma mixed up (incorrectly, I might add*), doesn't mean you have to show your non-Americanness by substituting different punctuation everywhere.
4) Finally, the big one. "Meh." I HATE that non-word. It is mean and sarcastic, and while it is meant to show disinterest in the subject, it also shows disrespect for the reader/listener. "Meh. I choose to not give you enough respect to even use a real word to express myself."
* Why incorrect? Because the period/decimal is more significant than the comma. A sentence can have multiple commas, but only one period. Same thing with numbers. Get it right! I roundly excoriate the SI for allowing it either way.
EDIT:
Also hate the concept of tinyurl.com. Why do people use that? Why does someone take time to find a link, go to a website, copy and paste the url into the website, get another url back, copy that and paste that into the email or web post or whatever? Why? WHY??! What do they think they are doing, who do they think they are helping, and what is wrong with these people?