Sure, it might work once or twice. Any more than that, or any significant amounts of money, and Paypal will catch on real quick...
IP addresses, cookies, past activities in the accounts, all can be used to root out this scam.
And once they unravel what's occurred, no doubt they'll look at your earlier transactions and, yes, refund themselves from the other accounts.
You don't have to use paypal. Purely your choice. Going through all these hoops to prevent them from reclaiming money that they'll have to pay back in the event of a charge back, that could be construed as intent to defraud them. If you're worried about getting charged back that badly, then easy - don't accept paypal. Or do so and take responsibility for the risk you're taking on.
That's what its all about - you want a benefit (accept paypal) without attendant risk (chargebacks), and instead opening yourself up to fraud accusations, if eBay felt so compel
led....