Runescape has some nice tricks for dealing with bots.
Random bosses who spawn if you farm to much. You can run or kill them if good but hard for an bot.
This should work in ESO to, might giving boss some vet dungeon capabilities like AoE single hit kill, reflect damage or immunity in phases designed to wipe bot groups.
Someone using rapids on an orc wearing speed gear - speed hacker report.
Someone calling Dunmer the master race in zone chat - Reported for racism, yes I have seen this.
Someone killed me in PvP but I am so super *** uber that no one can kill me without cheating - haxxor reported
Someone jumped on a table and danced naked while I was rping - Seriously...