This would be the same as bumping 100-1000x per day, which is disallowed. It would also be the same as having a bot that bumps with the same frequency, making having the multiple bots pointless.
For example, a user creates several alternative accounts. For each account, a bot is configured that bumps its theme. This will not be a violation of forum rules, but it will interfere with other users.
Therefore, I think that this is not the best idea.