Steve,
If you make an unreasonable and provocative remark that calls someone's integrity into doubt, as you did with Dave, you are trolling.

Yes, but I did not.
(I am often the victim of that myself though.)

I merely pointed out that Dave did not express his dislike of referendums until after the vote went against him.

That is in no sense trolling, but you always resort to vacuous name-calling when you lose an argument.