I think this is the best middle ground solution at the moment. Limiting the amount of posts that can be spammed would act as a deterrent for whoever keeps creating accounts and deleting them within a few hours.
As a bonus, if possible; limit only accounts less than X days old to that timeframe (this would allow people who actually want to post and keep their accounts the freedom to do so without restrictions).
I’m kind of for that to be honest. Will be playing it sometime over the weekend for sure