Where do you draw the line?
Everyone has different limits and language evolves.
In time words change not just spelling but meaning too.
I am happy to let nature take it's course and not sweat the little stuff. I used to be anal about it too but I think it is because we had it drummed into us as kids we looked ignorant or uneducated if we got it wrong but really, is it that important if the correct meaning is conveyed.
Read in context most know which is the correct intention regardless of the spelling