Don't even get me started. Pprune is probably one of the better forums (fora!) for decent spelling and grammar. Some of the aircraft sites are horrifying.
I think the most amusing faux pas of recent days was on Matthew Wright's TV show on Channel 5. They ran a story about keeping kids at school longer so they might learn how to read and write (imagine) and the caption they ran throughout the show read "... kids at school till sixteen" (or words to that effect. Brilliant stuff, you couldn't make it up