A voting system is extremely effective in preventing trolling here but only because PG put time into instilling the principles he wanted in the community through constant repetition, like training a dog. That required a lot of time on his part initially. Now imagine multiplying that by, say, 30 small sites that you are administering. So, I think it's not that the problem has been solved. PG may need to step in from time to time if the community 'forgets' the principles he started it with - such as when there is a big influx of new users.
A voting system is extremely effective in preventing trolling here but only because PG put time into instilling the principles he wanted in the community through constant repetition, like training a dog. That required a lot of time on his part initially. Now imagine multiplying that by, say, 30 small sites that you are administering. So, I think it's not that the problem has been solved. PG may need to step in from time to time if the community 'forgets' the principles he started it with - such as when there is a big influx of new users.