I suppose I'm in the minority here, as I tend to not care so much about grammar and spelling, so long as what is said is comprehensible and gets the point across. In spoken conversation, especially, I don't think it's terribly important to try and incorporate all the rules of the proverbial book...I use a lot of idioms and "shortcuts" myself, and one has to accept that it's more often than not a cultural thing rather than knowledge or education. An exception to that could be something like what one often sees written on social media, when the offense to grammar and spelling is clearly born out of laziness rather than a lack of education...THAT bothers me quite a bit.