Good point. I recently wound up in an akward situation with an  account that did a good job of convincing others here that they were legitimate. We had a surreptitious little battle and I made a permanent enemy. 

siggy47

carlosfandango

Incentivizing Downzapping

Undisciplined

@carlosfandango brought a good point about the importance of sheriff anonymity, in the linked comments. We don't want anyone taking retaliatory action against downzappers.

So, while I think it would be fun to have some sheriffs strolling through town, it could get ugly very easily.