On first read, grammar errors DO bother me. But then I step back and laugh at myself.
I have to remember that we are an international community and many of our members have learned English as a second language.
And - working in a junior high school, I also realize that things are changing when it comes to casual written conversation. Attention to capitalization, punctuation, spelling, grammar - seems to have diminished.
And - I'm thankful that few people here use words and phrases that have me running to Urban Dictionary to decipher. At least I UNDERSTAND the posts here