Have a record in the xlogfile of whether the game was likely a startscum, for analysis purposes. It’s easier for the game to track things like fountain quaffing and using obvious dangerous items. How exactly this would happen is not determined; the game probably shouldn’t try to make a decision itself, there will be some false negatives and positives, but storing fields for everything like “number of times quaffed from a fountain” is probably bad too. Also, if players are aware of a scum-detecting algorithm, some will deliberately work around it.