I wouldn't be offended either.
Sometimes I will deliberately spell a word wrong, cos its me accent. If ya know wot I mean. Teehee. But I think you will know about those.
If I remember correctly I did tell someone about a spelling error on one of the monthly challenges that they did, but I was sweet to start with so hopefully no offense was taken.
I do get teased about my spelling though in an online game I play. I'm playing on a USA server and the amount of people who comment on how I spell things is ridiculous . I'm originally from the UK for those of you who don't know.