Genuine mistakes can be acceptable. I make many myself, so cannot particularly berate others.
Repeated improper use of English – confusing the possessive its with the contraction it’s for instance – is simply lazy.
Even those with genuine reasons for struggling with writing can in many cases easily overcome such issues with technology.
If you have something to say, surely it is worth saying it elegantly and without resort to txt spk, &mpersands, poor punctuation, lazy spelling and grammar errors. The lack of importance attached to such things is often closely connected with the lack of thought in what is written.
I don’t get this pandering to the lowest common denominator.