What's Up with eBay's Sadistic Treatment of Its Sellers?

One would think that a seller was an eBay paying customer and should be treated as such. It seems that either (1) eBay does not agree or (2) they have shoddy, possibly unethical, ways of dealing with said paying customers.

An example of eBay's mistreatment of its sellers can be found in an AuctionBytes Blog article titled eBay Seller Suspended for Posting Neg in Positive Feedback.

eBay's new feedback policy does not allow sellers to leave anything but positive feedback for buyers. The seller highlighted in the AuctionBytes Blog left positive feedback for a buyer but included a negative statement about that buyer in the Comments section. Now he finds himself locked out of eBay. He can't sell or buy.

This seller left a comment on AuctionBytes explaining his suspension:

Here is the actual message you get when you attempt to sign in after beibg
suspended for leaving NEG to buyer in the POS comment section:

Dear (SELLERS NAME AND EMAIL)
We regret to inform you that your eBay account has been suspended due to the violation of our site policy below:

* Site Interference - Feedback Abuse

An activity that interferes with any of eBay's operations. In this case, manipulating the transaction process by entering into one or more transactions without the intention of following through with the transaction(s) and with the intent of leaving feedback as part of a campaign to harass the other member(s) involved.

Due to the suspension of this account, please be advised you are prohibited from using eBay in any way including registering a new account.

Please note that any seller fees due to eBay will immediately become due and payable. eBay will charge any amounts you have not previously disputed to the billing method currently on file.

Regards,
Investigations Department eBay AG

If I didn't know eBay's tactics and dirty tricks so well, I might be astounded. Sadly, this has become typical of the way that eBay treats its sellers. No respect. No recourse. No appeals. Just shut-out, "You are suspended." The seller in question believes that all of his listings have been expunged from the system. Should he wish to return to selling on eBay when his suspension is ended, he would have to build those listings from scratch. eBay does not save them, apparently.

Is this good customer service? Is this an acceptable way to treat a paying customer? Maybe eBay sees it that way but, as one who has been in retail and wholesale sales for much of my adult life, I find it appalling.