There are so many coins that are produced without their dev(s) understanding the interaction of parameters or having awareness of the security risks.
This is even more unfortunate when the dev team has basically good intentions, but they inadvertently produce a high-risk coin, that can be taken down by some kid with graphics cards.
And here's an unintended consequence: exchanges that take in new coins no questions asked are really suffering for it. Look at what's happening to CryptoRush (start
here and
read this.) Another second-tier exchange foundering because they've incurred huge losses by a new alt going ker-blooey.
Cryptsy really has a great niche in all of this. It's the top alt exchange, so any alt that gets listed on Crypsty has "hit the big time!" Cryptsy doesn't have that cachet unless they sit back and take their time when deciding whether or not to list a new alt: taking it slow only adds to their prestige. You might say that playing hard to get is Cryptsy's "game." So, the second-tier exchanges that'll list any crapcoin ends up acting as Cryptsy's field-test lab. When a new alt goes haywire, it gets injured and Crypsty remains above it all.
Were I to start a new exchange, I'd actually use the OP's filter when deciding which coins to list and not to list. I'd do so simply to protect myself and the customers.
Funny that it was Blackcoin that pushed CryptoRush over the edge...