I'm thinking some words or phrases should be outright banned during account creation. For example, if the site detects that a user used the words "bitcoin price down" in that order in the subject, the site should not allow that thread to be created; we don't need the same thread for the millionth time. I think this is an efficient way of combating such threads.
I know of some forums that use bots. Theymos could implement a bot that could detect these kinds of posts. It would take a massive workload off of the moderators.
Although like I mentioned above, most of these posts are in off topic so you can just ignore them.
Having bots like that would be useful. I don't know much about how those bots work, but I guess there is no bad sides? It would not load forum and slow it down right, or compromise personal things? Because that would be bad. Also, most of people can ignore off-topic, but there is a lot of shit topics in other threads as well. People should be a penalty for making shit topic. That would lower the numbers too.