lol You like to waste Poal resources with a feature that wasn't meant to be used the way you do.
Its purpose is to only block domains you don't want in your new queue.
What you're trying to do is to block the entire internet. You can easily do it browser-side with grease/tampermonkey.
As of now, I'll put a limit to 100 blocked domains per account (the average blocked domains by Poalrs is 10) and reset your block list.
:(
Having hundreds of domains blocked is a drain on resources (database), every time your refresh /all.
If you need help with coding a tampermonkey script that will do the same, but on your browser side, let me know.