Great comments, guys. Thanks for an interesting thread.
Here are my thoughts on some of your thoughts:
"Does designing a specialized fighting knife, pigeon hole or limit one's martial expression?" When the design requires a specialized skill set, I believe it does. I am a big fan of universal skill sets. The way I approach knife tactics works just as well with a paring knife or box cutter as it does with a purpose-designed tactical folder. The same can't always be said of specialized skill sets. As always, the choice is up to you.
"Does anyone think that carrying a knife that is specifically designed and made as a self defence weapon leaves the user open for prosecution should they indeed have to use it for self defense?" Yes. That's one reason why the Yojimbo bears a striking resemblance to a Stanley utility knife. It's also why I insisted on a blue handle option, even though "tactical black" outsells it by a significant margin.
"I totally agree about the dedicated being and staying dedicated, but a few years back, training was all the rage (at least lip service was), but There was very much talking (on these and other boards), you'd have thought that the market was enormous and endless, but when the rubber hit the road, it didn't turn out that way." Talking and training are always two different things. That's just the nature of the beast. I've been teaching my current curriculum for almost 9 years and the number of really interested folks willing to get off the couch and attend a class has remained pretty constant -- and pretty small -- during that time. That's OK, though. It just makes me appreciate the guys who DO train even more.
Again, thanks for a cool thread.
Stay safe,