Had a fairly perturbing situation with an ebay seller a few years back, here in the UK.
It occurred due to the no arrival of an item I purchased from this nut job. I waited over 2 weeks, well past the indicated delivery time, then contacted him to advise non delivery. He responded by saying that tracking confirmed delivery 2 days before I contacted him, I replied saying that must be wrong because I was in that day and nothing had arrived.
He then started to become hostile, saying I must be one of these scum bags that claims non delivery, even when it has been delivered, just to get a refund. I asked for proof of delivery. After a few days he sent this and the signature wasn't mine, just a scrawl. I told him that whatever had happened to it, it never arrived at my address and the signature was not mine and nothing like it, so refund me.
I heard nothing back but a few days later there was a knock at the door, it was him, his wife and their dog! They started ranting and raving at me, accusing me of fraud and insisting that he was going to force his way in and search my house for the item to prove it! I told him to jog on and tried to shut the door and both he and his wife tried to force me back! I managed to close it, with great difficulty, then went to the window to watch them whilst I called the police. He was going insane with anger, shaking his fist at me and shouting threats and profanity, his wife was also joining in.
It was then I played my ace card, I pointed up at the CCTV cam that looked at the front door, it also has audio!! it took him a while to realise what I meant, then he saw it! I also pointed at my phone and mouthed Police at him! I was on a 999 call as we spoke!
The realisation then hit him and his wife! They started to walk away, still spouting off. The best bit was, his car was in the drive and another cam had his reg no.!
This pair had driven about 175 miles to confront me, with nothing!!
They had gone by the time the police arrived, but I had obtained their details from ebay, so made a statement and provided a copy of the CCTV recording.
The Police said that even if I had done what they claimed, they would have been in serious trouble anyway, but as I was innocent of any offence or wrong doing they would be charged with attempted serious assault, attempted break in, threatening behavior with intent to cause harm, breach of the peace and a few other things. Enough to get their attention. It also transpired later that they had been questioning my neighbors, and a delivery driver who they happened to see!!
It went to court about 5 months later, I had to appear as the only witness, but backed up with incriminating CCTV evidence. They were charged with attempted assault, attempted forced entry into a private residence, causing distress and anxiety and breach of the peace.
Turned out he had a record of violent behavior, so it didn't go well for him! He got 24 months suspended, she got 6 months suspended.
They were ordered to pay substantial compensation to me, plus my expenses for having to travel to a distant court. They were also ordered not to make any contact with me in any way, permanently.
Ebay were advised of this situation and they permanently deleted their account and were told they would never be able to have another ebay account. Don't know about paypal. Whether they can get around the ebay ban is another matter.
So, make sure you have CCTV guys, because without that I could never have proved what happened and they would have got away with it.
There are some troubled individuals out there.