Current tactic: when everything is marriage, nothing is.
I have heard many many gay community spokesmen say that the slippery slope argument is false. They said that there is no movement to legalize polygamy or alternate family forms. They make a joke out of it when discussing gay marriage..
But now we see that they really do want to get to polygamy and group marriage. They want to use the legalization of monogamous homosexual marriage as a stepping stone to their goals.
I think that the gay community has a responsibility to reveal ALL aspects of their agenda. People in state after state are being asked to vote on this, and are told that it's bigotry to affirm traditional marriage. The gay community should communicate where they want to go so people know what to expect.
It's disingenous(sp?) for them to say the goal is recogniztion of same sex marriage, equal justice, etc. when the real goal is to radically change marriage and family once they establish the concept of homosexual marriage.