As an ahk developer, I appreciate your efforts, mouser, but honestly, I don't think there's much to be done...
Your words are very true, more than once I've been put off from updating GridMove because of these false alarms.
Still, it's good to see that more and more people are being critic againts these false alarms and reporting them instead of assuming they're right.
Truth is, while those can distinguish a virus from a stupid warning, many many more just ignore the program.