I've only got a few "Blocked" for various reasons. I do keep a "never trade/ WOT" list on WPS Office, close to 100 on the list. I'm with you, if someone doesn't respond on proposals(after 5 days) 3 or 4 times, they're on the list. If I have someone decline 2 times with no reason, they're on the list. If someone declines and responds with a reason why, then they're not on the list. There are a few on the list that are more worried about a small difference of value of the trade, but don't offer a counter. I trade a lot, try to be fair when I send proposals, but have found quite a few WOT members. I had a very strange one recently. I sent a proposal, very small trade for 2 cards I needed for sets. Other trader accepts, I sent my cards out the next day. After 5 days, I sent a message asking if he had sent cards. He replied, "I am still looking for them." Remember it's a 2 card trade. I sent another message advising he shouldn't accept until he verifies cards. Nine days after acceptance, I sent another message asking if he had found the cards, he replied, "No, but I will send them as soon as I do." I then asked for him to return the cards I sent which he received that same day. 12 days after accepting the trade, he said he couldn't find the 2 cards and would be sending my cards back the next day. After another 12 days, 24 days into the trade, I sent my last message asking if he had sent my cards back. That was 3 days ago and no response. This was a 2 card trade, I sent him 3 cards. He has been on the site for 6 years, but didn't start trading until a couple of months ago and had 7 positive feedback. How can you not find 2 cards? I have hesitated leaving any feedback, I dont won't to be that guy, but he's had 18 days to return my cards and hasn't. He's definitely on the WOT list and the "never trade" list.