This is a bit like the JW's sending you an invitaion to attend an unbiased information evening on your afterlife isn't it?
Not that it would be anything to do with indoctrination and gathering new members of course.
jbhack, you are inviting us to nothing more than a recruitment drive for the shark hugger movement.
Oh, and in case it's an RSVP affair, here is my response;-
Dear Shark huggers,
I will not be attending your recruitment drive.
This is because I am assuming it will be a whole lot of people we have already heard from telling us stories of how warm and friendly sharks are and how we should open up our inner self and give them a big hug.
If it turns out that you actually have some great new mitigation strategy which we haven't been told about ten time over already, then please make sure our good friend jbhack is well informed of such, so he can pass the good news on to us all here. It would be nice to hear something new and different from him for a change.
yours sincerely
pweedas

There. That should do it. Saved 60c postage as well.