oh excellent, thank you sir!

the btc maximalist guy ("I'm very against supporting altcoins") that blocked cat and john from attending the vegas btc meetup said "masternodes are vulnerable to sybil attacks, especially since it was instamined."
https://steemit.com/bitcoin/@catherinebleish/bitcoin-com-bus-shut-out-of-las-vegas-bitcoin-meetup-and-las-vegas-facebook-group-due-to-support-of-dash

but even if one person mined/owned 2,000,000 coins there would only be a 0.35% chance of deanonymizing a privatesend transaction. so that's over $26 million (at current prices) they would have to put up/risk losing just to sybil/snoop on less than half a percent of all transactions.