I think it doesn't really matter if someone has bad grammar/mispells lots of words I think it doesn't really matter. Sometimes I think some people complain about it for the hell of it and to bandwagon. As long as you can read it easily, then you don't need to tell them off about it.
Read:
Oh my god. I had a cupcake..
omg i had cuipcaek!!!1

Was that second one really that hard to read compared to the first?
Even if it is unreadable, you could simply ask them to say that again with correct spelling and advise them to use spell check next time. Instead of bandwagoning along and making fun of them.
And then the same people are probably against bandwagoning things like fsjal and stuff. Asdfgh??!
So yesh.. If this is a shifty excuse for a drama, it's coz I'm half asleep I didn't mean to so go away.