And may I add that in some cases of errors in spelling, punctuation or grammar there may be very good reasons. It may be a translation issue, or the poster might have dyslexia or even be vision impaired and relying on spellcheckers which are not always terribly effective at picking up errors. And there are also typos...
I've been caught out in the past picking someone up on spelling when to my shame there was one of these very good reasons for it, much to my embarrassment.

I have to say though, I very rarely stumble on a post which simply displays lack of thought - you can usually tell it's one of 'those' posts when some1 wrts lik this cos they thnk its gr8.