Hi interesting, but if you look at the power sellers programmme they can almost get away with murder at the higher levels without being penalised to any noteworthy degree because they bring so much revenue into eBay.
They (power sellers) can fool 'young' (low profile) eBay buyers much easier than those with an obviously dubious profile showing plenty of reds and neutrals. (I have only been conned once by a seller and that was a power seller, I took them through the process beyond the normal dispute and won !)
I think they ought to put the pillars of eBay society on tighter reigns first !
By following my guidelines and being accurate, polite, and honest but firm you will not need to concern yourself about eBay's tightening up on small fry who contribute too much bad publicity per doller paid to eBay.
I also believe troublesome buyers are attracted to poor listings like doubly or mis-priced goods in a supermarket, they are out to exploit a loophole in your listing and get it for less than they actually won it for.
So take care of your listing and it will take care of you