I don't know how exactly the "cheater" saves will be detected afterwards (no idea what sort of information is stored internally), but this would be a good feature to have anyway. I'd also suggest that there be either some sort of score merging functionality between different local highscore files or synchronization with the global server. (If this already exists, consider my remark irrelevant.)

Implemented.

@Taederias the highscores are already "merged" when you are using multiple ADOM installations.