I refuse to link or save any bank account or debit card with PayPal, only credit cards. Reason being and this did happen quite a while ago I had some random £300 debited from my bank account, payment was made to a gambling site and dealing with PayPal was the worst. First of all they wouldn't believe that I hadn't made the transfer myself, then they claimed to have evidence that the payment was made using a device in my house, they then claimed that the payment was made to my account on the gambling site and this kept on over the course of around 5-6 days. In the end I asked for all the evidence that they had and it was then that the person I spoke to discovered that there were other users complaining re the same issue and the same gambling site. Took around 3 weeks to get a refund and even though I asked how or what happened they refused to explain.
After getting my refund I removed my bank account and debit cards, it used to complain each time I logged in but I put up with it, since then the system has changed and it no longer complains.