Please consult your own link to the relevant statute of the Commonwealth of Massachusetts.
http://www.state.ma.us/legis/laws/mgl/272-99.htm
2. The term "oral communication" means speech, except such speech as is transmitted over the public air waves by radio or other similar device.
Such as a microphone and loudspeakers?
Your claim that Camenker and Whiteman broke the law just doesn't hold water. It wasn't a private conversation. It was a public seminar.
Here's another link of yours:
http://www.bridges-across.org/ba/tidh/context.htm
The mere fact of availability of professional development credits is not sponsorship.
However, the availability of professional development credits from the Massachusetts Department of Education signals that it was indeed a public event.
And the fact that GLSEN and others don't want the tape distributed proves that they know how explosive this is. They know that parents and other taxpayers will object to exposing their children to this nonsense.