Yes, I'd PM a mod and ask for your feedback to be removed if I was you... really almost all the players I play with regularly use it, and all sorts of greasemonkey scripts have been officially approved by lack.
I hardly think using a tool that makes your life easier is cheating, when it doesn't tell you anything that you couldn't work out yourself anyway! That is really one of the stupider feedbacks I've read, and I've seen some dumb ones!
