Is it ok to put in your listing that you will cancel bids from users who've left a certain number of negative feedbacks, or will eBay cancel the auction in accordance with their Nobody Ever Gets Ripped Off on Ebay schtick?
I had a question from a user who clearly hadn't read the description properly. I looked up his feedback left for others and he has a history of not reading descriptions then trying to extort partial refunds with the threat of negative feedback. I blocked him, and of course he's been sending me rude messages asking why, but in future auctions can I just say in the listing that I will cancel bids from users who make a habit of leaving unjustified negative feedback?