I'll not say publicly how I've sized you up other than to say it doesn't pay to try to be nice to you.
Clark never asked you to be nice to him. He suggested you're being arrogant and inaccurate, two significantly different behaviors.
I've had beers and such with Clark. He's pretty mellow. Doesn't suffer fools much, though. He probably wonders why I just smile and nod at them. He tends to let them string out enough rope to hang themselves with and then asks them whatever questions that will let them tie their own noose.
As far as "sizing him up", he's a tall dude and pretty well proportioned for his size.
If he and Kent get into a wrestling match, I think we'll want to move the furniture back or something is going to get broken.
Anyway... now that we've covered that no one cares what you two think about each other... Back to spins in Cessnas!
You keep wandering off into anecdotes about other airframes than the 172, and the assertion by those you're arguing with has been about that airframe, after your assertion that it'll do things it just won't without forcing it to.
You got caught trying to state the 172 does something it typically doesn't --without a massive kinetic effort on the part of the pilot -- and a significant mash of power at the right time to force the issue. Power off, it just isn't going to do anything particularly interesting in a slip. In a skid, it will, but it'll be all sorts of obvious that it isn't flying happily prior to the event.
The yaw string on a powered aircraft one was a good one. That doesn't work all that well. BTDT, got the t-shirt. Works really well in the glider, though.
(I got more of a chuckle out of the insinuation that no one reading the manna from on high had ever done it but you, though... that was just precious. Is there a shortage of masking tape and yarn somewhere near you that keeps folks from doing it unless they're an instructor? I gotta know. If so, there's a business opportunity there!)
Other airframes? Sure. Only trainer that spins better than a 152 is a 150, and like you said, it still needs a moron holding full control deflection to make it happen at anything faster than yawn-speed. But it will go over sooner and rotate faster than a Skyhawk. You switched to it for your "my student locked the controls over fully and bad things happened" story. To which the assembled masses here would say, "Duh."
If we're not going to stick to the words written and wander the topic all over the place, here's your Cessna spin Trivia for the day.
How many spin turns in a 150 until the engine quits, and why does it happen and why is it so consistent?