A small point... the fees charged by PayPal for Credit Cards are the fees paid BY PayPal usually. Every time you use a credit card in a shop, the shop are paying the credit card company, usually about 2.5%-3.5%; of course you don't see this happen, but happen it does.
It's exactly the same for PayPal.. and as a seller you are responsible for the Credit Card fees.
The reason they don't allow people to charge extra for paying by Credit Card is because then people would associate PayPal with the surcharge. Common business sense. I'd do the same.
Remember, PayPal isn't there for us. It's there for PayPal. And therefore eBay. Same as any other company.
Simple solution - don't like it then don't use it. But don't forget PayPal and eBay are companies same as any other, and are perfectly entitled to ask for whatever they want. You are buying a service from them. Complaining about how evil they are for their fees is like shopping at Harrods and then complaining how they're more expensive than anywhere else.
