Maybe this is 'out there', and though there would be a 'little' work on LL's or a Mod's end, it might just be a bit of an answer:
Someone suggested signing a form, indemnifying the site. That is a great start to begin with, because LL has always said to 'keep things above-board' and stay legal and legit. Any and all lines crossed shall be reported to the pertaining authorities. (I'm adlibbing there, but that's the 'jist of what he's said in the past. Rightfully so)
But, take that one step further, and have a standard piece of paper ready for us all to fill out and mail in (to someone LL designates, probably Tucker)
site name,
real name,
real address
real phone number
real business affiliation, if any
real isp
real drivers license number even, if desired. Or some other Picture ID.
None of this information would be for public use, BUT,,, it would go far towards verifying a member, their legitimacy, as well as their particulars. Only those 'registered' to use the PX can enter the PX. No 'double accounts' or any crap like that.
And knowing that their personal information is being held, the scammers then also know that said information can be used against them. All the while releasing The Hide from any liability or responsibility or whatever-else legal-ese that needs to be put forth.
So my apologies to Tucker up front, for even suggesting that he be "the bearer of The Book" but that process will in-and-of-itself weed out a lot of the idiot scammers that aren't real contributors.
Follow that up with minimum 4 months membership, with a minimum of 25 valid (not wasteful) posts each month, THEN eligibility to request clearance into the PX.
And, whomever is a computerologist can figure out a way of cross-referencing Hide names and/or real names and/or real address's and whatnot. To further eliminate doubling.
Thoughts, or boo's?