I wouldn't advise it, not only is it likely illegal it is also highly immoral in my opinion. If he is a scammer then forget about him, it's not worth it just put your efforts into something else rather than rallying a witch hunt. Also contact forum staff to ban him and again if he signs up with a new account (on same ip address/email).
However, are you sure he has scammed you? Because he hasn't contacted you back? Perhaps something has happened to him? He is ill? There are lots of possibilities. We should wait and see what happens in a few days, until then I will point my mining elsewhere though and cancel my buy order on these coins so thanks for the heads up.
I agree with StableCoin, it appears to have a good little team behind it now and I have also been trying to mine that, although finding the difficulty a little hard for my machine.
A new project that looks like it may have something will be CasinoCoin (CAC) which is launching in 14 days. It has 3 professional devs behind it who are in talks with casinos around the world who are looking for a single casino currency to use instead of fiat (cash in/cash out system in house). It looks like they have done some research and they may have something. It's not just another clone coin, although they are taking the name of the old CasinoCoin which is dying due to the dev abandoning it. Check out the bottom posts by 'casinocoin' - https://bitcointalk.org/index.php?topic=258090.300
Another great coin is peercoin, although that is sha256 so most can't mine it. I'm investing as much money as I can into that though .