These people of whom you refer often have no idea what the style is for.
Take WTF Taekwondo, for example - since some dumbass mentioned it. It is primarily a sport style with certain rules. The ignoratti cry that it's no good because you can't use it on the street (it isn't meant to be), or that they'd get their a$$es kicked by a wrestler (which is probably true if they were fighting according to wrestling rules).
Or how about Aikido, since it's also commonly mentioned. The complaint about it is that it requires compliance (never mind that the alternative is to accept a broken wrist or back). People don't understand that you don't tap out in Aikido to concede the match: you tap out to tell your partner: you've secured the lock/bar/choke, and if you don't stop I'm gonna get injured - but in the meanwhile you're doing your damnedest to get out of the lock/bar/choke.
That being said, I still think there are entire styles (not just schools) that should be avoided.
Here's an example of one:
http://www.youtube.com/watch?v=vi5xhTFHQ9M
@Sev, Jim R, yup. it's this bad. He's part of this org:
http://wmaa.com/about/
It says he sowed his seeds in Iraq and Afghanistan. No wonder they hate us.
@Ikde - maybe you need another example. Here ya go:
http://www.youtube.com/watch?v=briMFF3duow
...and another:
http://www.youtube.com/watch?v=92reqPJ4Z3Y
...and another:
http://www.youtube.com/watch?v=yQfu27gr60s
...shall I keep up the charade?
@Pugpaws - On behalf of the CDK organization, I am deeply regretful of his association; you are right, this is SOOOOO not like CDK on any level. He does claim to be 9th degree in something or another. Narcissism, in my opinion.
@JWBullDogs - SNL routine... LMAO!
Curious... in this video:
http://www.youtube.com/watch?v=0NbWT1o_JGs
...the kid seems to outperform his fellow adult students. Maybe this style is like that Star Trek episode, where the aliens get younger and younger as they age - here, the students progress negatively as they progress in rank? :-)