We can do that, but it’s just a sham, it doesn’t mean anything. Society doesn’t in any way recognize it.
Why is it hypocritical to want access to that which everyone else has access to? Aren’t you being more selfish by yelling “No! Mine!” and trying to hord away such priveleges to only people like you? Why is it selfish for gays to want, say, the right to make medical decisions for their partners, the right to be in their hospital rooms when they’re deathly ill, but not selfish for you to want to restrict those rights to just people like you?
Yes, by marrying the person you want to have these rights. I don’t have that option. Why should you have that option but not me?
Non-sequitor. Transgendered people, not being gay, have no horse in this race. To answer the question, though, I believe they should be regarded as being whatever gender they have chosen to be in their post-operative condition.
If society can come up with a way to administer and organize multiple-partner marriages without creating a legal morass (what happens when one person wants to leave the group marriage? who gets custody of children? who has final parental rights?, etc), then I see no problem with that. That’s a much bigger change than gay marriage, though. Gay marriage only requires making legal forms gender-neutral. Polymarriage is much more complicated. Insurmountably complicated? I don’t know.
Those entitlements are good things, though. They make life easier on married couples, make it easier to raise children and organize one’s existence. They make society stable. Why is it evil to want gay society to be just as stable as straight society?