I used to have a Falco's hawkfish in my old 90 Gal. before I moved, he ate all of my hermits, snails that fell over and were vulnerable, but he didn't ever mess with my coral banded shrimp.
He also wasn't very nice to fish around the same size as him. BUT, like everyone else said they are AWESOME fish, very personable and interesting.
I know its a little off topic, but if any of you remember the Red Fin Waspfish I got a few months ago, he is pretty much a 100% peaceful hawkfish/lionfish mix.
He usually swims slowly like a lionfish, but when I'm feeding he swims as fast as a Hawk.
He has never messed with anything in my tank, and just kinda chills all day in his spot. (which he changes every couple of days)
The only thing I don't like about him is that there is almost NO information on them.
I have found only two sources, one saying the venom is exactly like a lionfishes while the other states that it is one of the most venomous fish in the trade other than stonefish.
So I don't know what to think about his venom, but I sure as hell know where he is at all times my hand is in the tank, HAHA
Nick