Chauvet makes a lot of good stuff. They are all very popular with mobile DJ's and I see them used quite frequently. I own several products from Chauvet and they are all deemed safe. They may say in their instruction manual to not necessarily aim certain models at a crowd but, because the mobile DJ market is often not well versed in lasers and safety, they are still regarded as being safe. American DJ makes a few things as well and I think they would all be fine for your purposes. I would rather see you get something from Chauvet or American DJ over a no-name effect laser of Chinese origin since I don't know that the same can be said for all of those units. The Chauvet may cost a little bit more but, in the end, the quality and safety factor is worth it. Filters, burst gratings and low powers are all your friend. If you want a really nice "wow" laser, take a look at the Chauvet Scorpion Storm MG. Great little laser for about $150 US.
http://www.chauvetlighting.com/scorpion-storm-mg.html I see they've been discontinued but a little searching and you should be able to find one.