Yeah there are going to be a HUGE amount of false positive on the free and or even the paid threats. This is the very nature of IPS… It takes a lot of time to tweak it for a specific network to not show lots of noise..
It just blows my mind how users think oh clickity clickity full blown IPS for free and zero noise or false.. Like saying hey you know which end cuts on that scalpel, sure your ready that open heart surgery then ;)
Do you really think IT is that easy that any billy bob can push a few buttons on a gui and be all set with something like a IPS???
How come users don't think they can tear apart their transmission and rebuild it - but any tom off the street thinks he can fire up a IPS system to block down stream natting with a click of a button? ;)