Simple spelling errors, no. But terrible punctuation and grammar or annoying language, yes. However, not enough that I would correct someone (usually). I made the mistake once (IRL) of correcting someone's spelling then learned later they were dyslexic. Not my proudest moment so for fear of embarrassing someone with a genuine reason for their spelling I usually leave well enough alone. It doesn't help the person in any way in my eyes however; apostrophe's in wrong place's when they "should of" known better...make me grind my teeth.
Also, it doesn't stop me laughing when anyone types 'rouge' instead of 'rogue'.
Also, it doesn't stop me laughing when anyone types 'rouge' instead of 'rogue'.