Omar is not good at his job, BUT we're talking about twitter updates, where theses guys don't have a lot of time to review their work. I don't see the big deal here. Guys like Chaucer, Shakespeare, and Donne didn't use standardized spelling and punctuation. I get that it's fun to pick on Omar, but let's not be petty.
http://www.ruf.rice.edu/~kemmer/Histengl/spelling.html
http://www.ruf.rice.edu/~kemmer/Histengl/spelling.html