Is bad grammar unattractive?

Blacklite
in terms of texting or Facebooking, or whatever it might be. lets say you are seeing or talking to someone, and through text they have bad grammar. not in the sense that they can't formulate a sentence, but things like using "u" "r" you know, internet slang? is this a deal breaker? a turn off? does it not matter to you?
Is bad grammar unattractive?
23 Opinion