The point I was trying to make that is actually more general than PayPal was: When you want to take back control over convoluted and untrustworthy systems that end up accessing your account in some way, you can't really do it at the level of the payment mechanism.
I've done this a fair amount in the past: When I would do business with a vendor that I don't trust all that much with the way they do their billing, I would give them a credit card number for a prepaid credit card with tightly controlled balances, instead of giving them anything that's linked to my main bank account.
But it doesn't really help. When the untrustworthy party wants to deduct a payment from the mechanism you've given them and it can't, then they will instead just turn to bullying and threatening legal action, and you end up paying them whatever is in dispute because you won't want to risk them taking legal action.
Another consideration that enters into this is the dark and murky territory of consumer credit rating. If there's an account that's in your name, regardless of whether it's PayPal, a prepaid credit card, a bank account or whatever, and there's a charge that hits the account and there's no balance, then this is an event that they'll collect data about, and that may be disseminated in ways that you may not realize, and it may come back to bite you in the ass when you want to apply for a mortgage or something. So it's best not to go that route.
At the end of the day, the only thing you can do is to not do business with certain kinds of entities at all. And PayPal is definitely on my list of entities not to do business with.