I think ultimately the market will be the arbiter of this. Look at how out of the dozen or more coins to launch over the past couple weeks only a handful have made it to exchanges and only a couple of them have retained any value at all. The coins launched in the past few days are generating almost no interest from investors. Even the most enthusiastic investors seem to be learning to not put money into every piece of shit that comes along. This is good since it's the only way to solve this problem. As long as there is demand for something there will be supply no matter what you try to do. If we get to a state where people are only creating random shit coins for fun with zero expectation of profit, then we'll be in a better place.

If you do decide to start something like this, one suggestion I have is that Github repositories should be started as forks off of whatever coin they're copying. It's so much quicker to evaluate code if I can see exactly the changes that went into it --as well as which code base from which it was derived-- in the easiest way possible. It also makes it much easier to track down bugs that have popped up in certain families of alts. This should be mandatory as far as I'm concerned.

One other idea that I've suggested in a few coins' announcement threads half trolling is to make make transaction records for all premined coins public. It's trivial to export the csv of transactions from the wallet to which coins were premined. This could then be posted on the coin website with references to where all the transactions went. Links to giveaway threads or bounties paid (make sure bounty recipients have posted their addresses publicly) would be sufficient documentation for most purposes. Of course there's little to stop a dev from reneging on promises of transparency but it would make it harder to dump if everyone knew what was happening.