Registering in order to give a presentation

I've been reading with fascination Michelle Boule's posts about give a full day preconference at TLA. Not only is she not getting paid for the preconference, they are REQUIRING that she register for the conference in order to give her presentation. I'm impressed that she is throwing a fit and such a public one. Now it turns out that she misunderstood the letter from TLA, but I know from personal experience, that this situation is not out of the realm of possibility. It happened to me last fall at the USAIN meeting. I was being a sport and filling in for a speaker who cancelled at the last minute. I had to drive two hours down to Ithaca. And when I got there, they demanded that I pay the registration fee. I argued briefly, and then just gave up. I won't do that again!