If you stand by your keyword, don't sweat it. Just ignore the flag. There is a certain person here that enjoys going around and flagging keywords for no apparent reason other than calling attention to himself. I think we've all been the victim of this certain someone at some point.
Yes, I also hate improper results among my search results and when I get angry I flag all of them. Especially when I see someone spamming. But lots of flags are made by innocent buyers who just hit unintentionally the wrong button (it has happened to me as well), so we can't be too sensitive about those flags.