I think (2) is the best option because that can be objective. PoS coins that had a period of PoW should also be flagged with this. I think the definition should be based on what we collectively recognize as fastmine or ninjamine or instamine or fastmine. We can take some thoughts from the article written by whoisthelorax here. He defines it as "Obvious and proveable scammish behavior such as self evident instant mines, super quick block halving, unannounced premining activity, or premines that represent unusual amount of coins. Most statistics tend towards unfair early adopter benefit. Very little benefits long term, fair usage."

With DRK I think it is easy to to see that it represents an unusual amount of coins and that the "block halving" was super quick. The block reward went from nearly 500 coins for the first day and a half, and then it was less than 50 coins, and now 16 months later the block reward is less than 5 coins. I have made my own analysis of the first 4500 blocks to show what I mean.

For the first hour of Darkcoin mining there were 67500 DRK mined. If you only started mining on day 2 after block 4500 you would have to mine for 136 hours for there to be the same DRK created. That is nearly 6 days. If you are mining today it would take you 23 and half days for the same DRK to be created.

For the second hour there were 514040 DRK mined. If you only started mining on day 2 after block 4500 you would have to mine for 292 hours for there to be the same DRK created. That is more than 12 days. If you are mining today it would take you 178 days for the same DRK to be created.

For a cryptocurrency to be fairly launched it cannot have the same amount created in one hour that will be created in 6 months a year later. This is not good and must be marked so that those who visit CMC know!