Do you have some evidence to suggest a "pro" is more likely to concede with a "harsh" approach? And what is a "harsh" approach -- you mean just making it blunt, like "you're wrong and your beliefs are all crap" or something? Mocking their belief? Do you have any examples from on this forum? Aren't "pro"s pretty much immune to any form of argument whatsoever? So mocking won't help.
And since it seems unlikely to get them to concede, then to me it seems the purpose of debate shifts from trying to convince the opponent to making a show that will hopefully be educational to the audience, so as to sway people whose minds are more open. And a mocking post is not very informative to a third party as to just why the mocked belief is wrong.
I have no evidence either way.
Not so much
"you're wrong and your beliefs are all crap"
But more show why it's crap. The point I was trying to make is, we may as well say "it's possible for *insert anything here within physical limitations known to date* to live in the USA. The reason why it's not possible is: There is no real evidence of its existence. What has been claimed as "evidence of bigfoot" is evidence of man playing jokes, or hoaxing for cash, or perhaps even some of them are delusional, or even mistaken identity. (on purpose? elk lay what?) The whole point is, there is no fairy dragon footy. There are humans fooling around... That was my point. We should be exposing the "pros" and "cons" instead of playing the game. It is all a sham, and should be called it. Not, well maybe its out there... we just don't know. "it's totally possible for it to be out there" Is not acceptable. (to me) "there is enough food to support bigfoot" is acceptable... (to me haha) as a skeptical viewpoint. If it were out there, we would have
some evidence of it by now. It mimics other social constructs perfectly. It should be presented as such (IMHO!) and the "pros" should not be coddled.
We can prove what leaves the footprints many times over. (humans, or humans misidentifying) The woos just don't like the answer, or what has been proven. All they need to do is prove one was left by a bigfoot. We can prove many were left by men.
Films/videos? Search youtube. Nuff said.
Real actual biological evidence based on DNA or remains = 0
Specimen = 0
Authentic sasquatch anything =0
Not one piece of so called evidence has ever been attributed to a bigfoot. (other than humans misidentifying, or outright fabricating)
Humans making so called sasquatch evidence? = all of it.
The bigfooter point of view: "I hate hoaxers! they should all burn for eternity muwaha"

You get the point... Yet, that is the entire phenomenon. It reminds me of this image ;-)
Bigfooters = this