I'm a bit of a Warlock aficionado. I've played almost nothing but Warlocks since 1985(I've had a Mockingbird, Ironbird, ST3 and an Epi LP). My next Warlock, a 2007 Neck Thru, is due to arrive tomorrow.
The angles and curves of the body hold it securely between my chest and right leg. I don't even need to brace the neck. I very rarely play standing. What's the point? I'm probably never going to play out again.
None of my Warlocks were neck heavy. The mockingbird was though. I gigged out with my 2004
NJ Warlock bass for a few months two years ago. Didn't have any problems with it. Except the band I was sitting in with tuned to Drop C, so I could feel the strings rolling across the fretboard, which I didn't like too much.
As for them being fragile, the only thing I can think of is that in all of its glorious pointyness, the Warlock is prone to get whacked on everything, which causes chips and nicks on the points. I've even seen horns on the widow headstock get knocked clean off. I never liked that headstock, but unless I pony up for a custom shop model I'm stuck with it. I prefer the classic B. C. Rich tombstone which is available on the Mockingbird and Bich. I've grown accustomed to the widow though. You do have to be really careful because they are quite a bit longer than other guitars, and it's pretty easy to bash them into stuff.
I'll post my half assed review of the new Neck Thru after I've spent some time with it.