I would respond with a mildly self-deprecatory comment that simultaneously ironically highlights the strange, unnecessary harshness and lack of humor one may find surprisingly commonly on LW, but I expect it would just get a bunch of downvotes and be a silly waste of time, amusing no one but myself.

Good decision. I'll point out, however, that I was being kind, not harsh. Your behaviour was sending 'troll' signals and my impression was that you were not intending to. The hypomanic enthusiasm your post and followup replies suggest can be a powerful force at times but needs to be carefully managed lest it result in unintended (and unconsidered) consequences. If you really want to go the distance with your education startup you'll need to balance the enthusiasm with, for want of a better term, stability. Understanding (and caring) how others will respond to the signals you give will also be absolutely critical. Much (perhaps even most) of the task of your startup creation (even an educational not-particularly-for-profit) will be in figuring out what you can do to invoke the desired behaviour in others.

(Note that using your terminology this isn't advice to be 'sane and well measured', this is advice to do 'insane' right.)

I for one don't understand why you specifically mentioned Rolf. He was extremely charitable with you, and did nothing but try to help. Why highlight him in particular in that context, of saying you're insane or whatever?