Any coin that meets any of the below criteria easily makes the cut:

1) The coin is a clone/tweak of bitcoin.
2) The coin uses centralized checkpointing, "backing"/pegs, etc. Anything centralized.
3) The coin was pre-mined.
4) The coin was ninja-mined.
5) The coin was insta-mined.


...many more easy-to-spot criteria, I'm sure.