Sorry, but I think if admins would be unhappy with this, they need to enforce resource limits, which is a feature mastodon supports. It shouldn't be on the user to regulate volume.
(FWIW, I host my own instance so only me that would unhappy)
The tool is here, https://github.com/robertoszek/pleroma-bot
@Daviey in a different thread I was commenting I hope all Admins / mods know how to use 2-factor authentication. 💔
Safe to say that not everyone running an instance knows about resource limits unless they are pre-configured and installed by default.