Clamping Bike in Workstand

I just bought a new Trek 2100, and actually read the manual. How
unusual for me!
It mentions that the top tube should not be used for clamping in a work
stand - I guess they are worried about crushing it. They suggest the
seat post.

The seat post in my bike is carbon fiber. And the bike is way off
balance if I were to clamp it there.

But, OK, I will do that, but I am curious - is there any danger in
crushing or snapping the seat post as well?

Can the top tube be used, if I am *careful* about clamping it, or would
that be fatal?

Thanks for any help with this.

Oh, I don't actually *own* a workstand yet, but I am think of ones like
the Spin Doctor or Ultimate (the ones that run about $150)

Ken

--
(To reply via email, please remove "ECM" - thanks)