I really find it hard to fathom why people who make grammatical errors are considered to be in the same league with dangerous drivers, tyrannical bosses, whining complainers, lying politicians, telemarketers and the like.

Grammatical errors don't harm you or inconvenience you in any way. What's the big deal?

I guess one of the things that get up my nose is—people who complain about other people's grammatical errors.

Oh, I know, this could get recursive, and could go on forever: "I hate people who complain about people who complain about grammatical errors." – "I hate people who complain about people who complain about people who complain about grammatical errors." Etc.

Let's not. I promise to get a life sometime soon.