Hmmm...maybe this problem could be alleviated by not auto-subscribing new users to a meme-based forum? Of all the great subreddits, AdviceAnimals (albeit, which is pretty funny sometimes), seems like a silly one to acquaint new users to.
Have any of the bustups of voting rings been done algorithmically? That is, does reddit have a way to pick out cluster of reddit accounts that seem to behave like scripted bots? It seems all of the major domain bans (such as the Atlantic) were done through manual user suspicion and inquiry.