So I've looked into this not being able to leave buyers negative feedback and not being allowed to leave negative within a positive, and sorta found a loophole. Instead of risking getting in trouble for saying "BAD BUYER" in positive, you should leave a positive feedback for them. If they already have very low feedback (like 87%), don't leave positive because the green donut will increase their feedback score. Otherwise, try these...they're from a fellow Ebayer:
*potential to be best buyer on Ebay, moved all the way up to the bottom of my list*
*Great ebayer, perfect Personality for new Ebay policies*
*smart buyer, really takes complete advantage of sellers*
*Good Ebayer, per ebay standards. but so is every other buyer out there*
* Helpful Customer, convinced me as to why I should sell elsewhere*
*motivational buyer, I'm worked 10 times as hard with them as I should have had to* I like this one
*One of those gems you love to see come back, so you can cancel their bids*
*This is certainly one worth watching* **CLOSELY**
*Its buyers like this who instantly double ebays listing Revenues*
*This one escalated my emotions, I woke up feeling bad, now I feel even worse.
**I'm sure Ebay is proud to have this one on board**
I guess you should make it as subtle as possible
*potential to be best buyer on Ebay, moved all the way up to the bottom of my list*
*Great ebayer, perfect Personality for new Ebay policies*
*smart buyer, really takes complete advantage of sellers*
*Good Ebayer, per ebay standards. but so is every other buyer out there*
* Helpful Customer, convinced me as to why I should sell elsewhere*
*motivational buyer, I'm worked 10 times as hard with them as I should have had to* I like this one
*One of those gems you love to see come back, so you can cancel their bids*
*This is certainly one worth watching* **CLOSELY**
*Its buyers like this who instantly double ebays listing Revenues*
*This one escalated my emotions, I woke up feeling bad, now I feel even worse.
**I'm sure Ebay is proud to have this one on board**
I guess you should make it as subtle as possible