I voted yes...
BUT, you never tried to make a compensatory _trade_ with him. You demanded a one sided trade of extremely small value, less than a dollar. IMO, after reading the thread you really came off as a jerk and I can see why he didn't want to listen to you. You bashed him over the head with rules immediately.
We had a trade proposed and accepted, addresses exchanged and then Giant_Glass_Box canceled. I had offers out to other traders and dropped all of those because that trade had been accepted. Now back to square one and I feel I should be allowed to leave negative feedback.
Giant_Glass_Box Will do. It might be next week before I send. Crazy busy right now. 17 Jul
Wally_H ouch, next week... 17:13
Wally_H tomorrow or the next day ok, but I wish you would have said something about sending next week before confirming the trade. 17:16
Giant_Glass_Box No worries. I don't need them that bad. Sorry to waste your time. 22:08
Wally_H the trade rules say that your not allowed to cancel the trade after you confirmed your address 01:41
If you were depending on cards from Glass to make your other trades maybe you shouldn't trade with cards you don't have in the future. Patience is a virtue they say. If you would have just waited to get the cards from glass before committing other trades then maybe you wouldn't be so butt-hurt right now. He apologized for not being able to get them out in time. He's obviously either never traded or not been on here very long and some understanding for the rules should be given.
So in Glasses case, I think neutral feed back is appropriate, and wally should try to be more upfront and open with what he's going to do with the cards before he confirms _his_ address, especially with a new guy.