However, all that aside, I don't really give a rat's ass if people misplace the occasional piece of punctuation or misspell the odd word. Do it myself on occasion, and I'd get seriously pissed if someone took me to task about it.

A few years back on another site someone called my grammar into question. I read his post, did the corrections and necessary rewording and reposted what he'd written.

Even excellent posts can contain errors of style.

'In a very rare exception to possessives, however, the possessive word "its" does NOT have an apostrophe. Its charm is that it's one of the few possessives that doesn't.'

It is not an exception, however. Possessive pronouns (which then become adjectival in nature) have never used apostrophes to indicate possession.