I agree Tippy.

And it is not only the seller being penalised.  Honest buyers are treated with suspicion by sellers who have been ripped off by dishonest buyers.

I have had a couple of unpleasant experiences with sellers who have obviously had shonky buyers make up disputes.  I have always ended up with my refund but I am pretty sure I am now blocked from buying from the sellers again.  It is a pity as I am usually a repeat buyer when I find sellers I like.  I have never left bad feedback in these cases either.