From Rule 4:
Mangling of the English language whether through ignorance, age, sloth or intent...
Hit the "report post" button, say I, when a post is clearly in violation of forum rules. Rule 4 is pretty clear, I think. I admit, I get a bit lazy about this, and I too try not to be a "grammar Nazi" -- but I was also annoyed by both of the posts you're referring to, as I've been, Heaven knows, by plenty of others.
I fret a little about bugging the moderators with this stuff, as well, but then again, if enough of us report these posts, it will help to show that plenty of members do care, and -- who knows -- might encourage the Mods to remove "recidivists," as Rule 4 also says they should...