I would hazard a guess that for the majority of us, it is too late -we are already set in our ways. I've been known to edit my posts when I spot a spelling or other typo. After years of reading other people's emails, I am used to translating their/there/they're, your/you're, of/off, its/it's, to/too, were/where, XXXX/beer.
It's a shame that the focus on grammar and spelling that we grew up with isn't there today but perhaps this is an acknowledgement that there are things which are more important for our kids to learn.
My personal pet hate is "should of", "could of", "would of". Despite that though, when someone says or writes it, I know what they mean and I don't bother pointing out their mistake because they're unlikely to change their ways as a result and they'll just end up thinking I'm a smart .