My opinion is that it's cowardly and shallow to post someone's clip/pics (for entertainment?) and rip on them when they aren't here to speak for themselves. When the person is here to speak for himself, ripping on their clip(s) is just rude and disrespectful. Again, just my opinion.
That would seem to lead to a policy of not commenting at all, if some rough or jocular remark might be taken as...what? Rough or jocular? Warriors should not be overly sensitive, even if they are warriors in only a manner of speaking. I would also say that someone asking for advice or comment, about anything, ought not be too particular about what he gets. It won't all be kindly.
I see here a point worth pondering, the way in which people acquire what they think are martial arts, based on impressions picked up via the popular culture. This is a problem for real deal martial arts of all kinds, you have to sort out the boob tube and video game console information stream from the real thing, and convince people that what they saw is not what you teach. Someone who learned Western fencing from Zorro movies would embarrass himself in a real bout and in sword combat he would die.
Some time back we had a video on here about a self-styled ki master blaster getting beaten on by someone whose skills were not all fantasy. Here it is, found it!
http://www.youtube.com/watch?v=gEDaCIDvj6I
What should be my response? 'If you can't say anything nice, don't say anything at all'? That would leave me speechless in this case. There are other cases that leave me wondering what you would have me say, or not say. Yellow Bamboo? Or that taiji guy whose students gyrate weirdly when he waves at them? The world of martial arts contains a certain amount of absurdity. How should one deal with it? Like so?
If it were only a matter of making fun of people for entertainment, that would be wrong, I agree, but there is information here, about how people understand martial arts or, in the cases I mentioned, fail to understand. Should discussions of that kind be off limits?