well, if they considered it as learning !! they will not get bothered.
to me I like to be corrected by others, cause they won't correct me twice
we learn from our mistakes, if we keep getting upset cause others try to make our english perfect, then we will never learn.
sometimes I observed some wrong spelling or grammer here in our section, but as you said I'm afraid to make them upset cause of my correction
just remember ::: we learn from our mistakes
thanks for passing