The seller is in breach of ebay contact by providing customer detailed. The seller can also be sued for giving out personal information. Ebay has done this before to seller who uses this site.

Hey, psycho, you have threatened many eBay sellers before, I want to let the world know it is you. Because of my exposure, you change your behaviours, which is good for eBay sellers. Many eBay sellers have you in their "block" list, eBay sellers will think twice before selling anything to you. eBay is watching you too. This site is not eBay, therefore, I am not breaching anything
Do you want to sue me? go to see a lawyer first, then has your attorney contact my attorney.

PS, I am going to your island for 2 weeks vacation, we can meet and chitchat,

By reporting this buyer you've become an important part of how we identify and reduce abusive behavior on eBay. We will use the information you provided to investigate whether the buyer has violated eBay policy and take appropriate action. However, for privacy reasons, we can't discuss any specific actions we take against

The above information is taken directly from eBay. eBay collects all the complaints and will make approximate action. eBay will limit your returns, delete your negative feedback or completely ban you from their site. So, you are the one who should watch out!!!
If eBay is such a bad place for you, why continue to buy? I know the reason why, you were hoping eBay sellers give you refunds, so you can get items for free, you are a scammer.