It depends.
If we are looking at a fighting art, then maybe. If its a recreational art, then no. I'll qualify my definitions first:
Fighting art - heavy empasis on sparing, destructions, etc. Tourniments feature promidently, and injuries occur. BJJ, Muay Tai, Krav Magra fit promidently here.
Recreational art - minimal to no sparing. many many belts, emphasis on the 'theory' vs application, rapid promotions or none at all (no belts). Very kid friendly. Injuries are rare, as is competition fighting. Tai Bo, Some TaiChi and some TKD fit here.
The rec arts are pretty fast growing, with the TKD schools seeming to be the most dominant. Many community ed programs now feature Tai Chi aimed at the elderly as a way to enjoy nature, and stay fit. These seem to work as a good intoduction to the arts, without requiring you to be in perfect shape, or do things 'perfectly'. I've spoken to many people who have spent time in these programs, and later moved on to more intense programs.
The fighting arts aren't so glamorous. Most "karate moms' don't like the idea of little Billy being a legit ***-kicker. The fear of his becoming the school bully often outweighs the idea that he might learn discipline and proper self defence. Also, they don't like the idea that he might come home minus a few teeth, and anyway, footballs 'safer'. Politicians fear the fighting arts. The idea of "Fight Club" and UFC worries them.
So, whats the answer?
I dont know.
Take the arts back underground, and you have removed the potential for positive PR, and reinforced the negative. Leave them out in the open, and run the risk of turning out a generation of blackbelts who aren't worth the paper their certs printed on.
Maybe, the idea is to educate ourselves on what each art really has to offer, and do some cross training. Then, we can educate our customers so they can make better decisions on what arts really are right for them. This way, we avoid (as much as we can) the mcdojo syndrome or the belt-factory problems.
Just my 2 cents (in rambling format.)

:asian: