I doubt that every pool running at 0% wants to scam ... but I see you point, I guess most of them just want to get higher attention and raise fees later (having gained some solid hashrate pointed to the pool in the meantime).
We just started our pool and we had exactly the same thinking, should we start with 0% to raise attention or not? What about raising it later? How will miners react etc.?!
On the other hand, it is quite hard to start a pool with fees, when you do not have big amounts of hashingpower pointing to your pool.
At the end we decided to come up with 0.75% instead of the often seen 1% ;-)
If you want to give it a try, feel free to point some of your hashingpower towards our pool ... we will be more than happy to have more power "On board" ... and of course we are scam free ;-) (I guess that's what they all tell
)