A pet peeve of mine is the deliberate misspelling of words. When I used to deliver meat in Cleveland the 2 largest grocery chains were Bi-Rite and Sav-Mor. I hated the idea of a generation of kids forever misspelling those 4 words.
In company I worked for the head of IT was super smart about computers. He'd been programming since childhood. But when he broadcast an Email about a meeting and I pointed out that in the phrase "goto the breakroom". go and to should be separate words, he didn't even believe me.