Precrime sounds pretty Orwellian (Philip K. Dickish, i guess), but it's fairly practical.  Here's why:

he could also buy a knife <- allowed
-he could buy a AK <- allowed
-he can buy 100 banana clips & double them up with duct tape <- allowed, no victim no crime
-he can walk down the street with all this faggotry, spraying rounds <- allowed, no victim no crime
-he can kill someone <-not allowed, but 'til he does, we'd be practicing precrime, which is a bad thing, so we won't do it.

Drunk driving @100mph down Main st. with an AK & shooting off bursts <- allowed, because no victim yet, precrime.
Diddling loli <- allowed, don't need no nanny state pushing its mores on muh freedomz, no victim if loli cool with it.

It's commonsensical to assume that a sold account will be used nefariously.  There's also no guarantee it won't be put in a mason jar & become a beautiful work of art.  But I'd rather risk infringing on the freedoms of one budding artiste than live in a wasteland of [99% predictable] scam.

Sorry for the tangent/rant, just nurturing my inner Nazi.  Don't hate, tolerate