You can put it in red, yellow, or any other color, but people looking at 1 or 2 paragraphs of sellers 'rules' will probably not bother to read it.
As a buyer, it really turns me off to see that and I DON'T read it. I read the description, pay right away, and hope the item is as described. If not I know I am still protected.
As a seller, yes it stinks to be prevented from leaving negative FB to bidders that don't pay, but there are procedures for that scenario..I send an invoice on day 2 and open an Unpaid Item on day 4..no emails asking if they're gonna pay, cause they either will or they won't. I have no rules in my listing, just one sentence saying payment is expected within 4 days please. After all, I know no one is reading it
And no it's not fair at all to the sellers but we can't do anything about it except file those reports and get our fees credited.