Well here's my extremely dumb reason for proofreading. I've only recently grown comfortable with commenting on YouTube. (Trolls never intimidated me but I found them to be so annoying and so unpleasant.) But because I'm a card-carrying technophobe, I rarely if ever understand how to use the tools of the comment space and still don't know how to edit or delete what has already been posted. In technophobe world, once posted, that's it, so try not to look like an idiot (even when you feel like an idiot.)