Obviously we would completely purge any public keys for accounts with zero balance and with no aliases.
Is there any way this could lead to a Sybil attack?
If it is possible to create a "new" account *with* a public key (as an atomic operation) then this shouldn't be a problem (isn't that coming?).
no i think hes right, and i was wrong. you didnt quote his edit to add the blurb about merchants storing old accounts. things could get very hairy and mixed up that way.. kinda dangerous the more I think about it, to completely purge. wed have to well publicize the risk
They may not be able to do it *right now*, but in a few years it may become feasible. From the attacker's point of view it's the same problem to solve as darkNXT mining.