I don't wanna be the annoyingly anal correcting guy and I ignore spelling mistakes in every thread I read, after all this is a bodybuilding board not an english language board, but when I see the wrong word being used I sometimes can't help but mention it and I genuinely do it in an attempt to be helpful.
For
instance 
when someone types "little lone" in the context of "let alone" I think I'm helping by pointing it out because the person has heard others say "let alone" in certain contexts and thinks that they're saying "little lone" and parrots it, albeit in the right context, but never really understands the phrase they're using.
Make sense?