That's what a lot of the gay marriage thing was about...gay folks being able to use the protections that have always been available to straight couples to protect their assets...and especially, whom they leave them to.
I read too many stories of gay couples with one of them passing away and the the greedy, bigoted family moving in to take everything left over, denying the relationship even existed for the other gay person and leaving them nothing and no way to challenge the family.
I'm not gay myself, but my family acts like I've described (and would rob me blind given the chance, alive or dead)...and would be interested in seeing what kind of protections I could set up for my friends afterwords. For one thing, the family would get nothing at all, and I don't want them anywhere near my funeral when it happens, as they're famous for shedding all sorts of fake tears at funerals for people they hated and had nothing to do with most of their lives, and causing problems for the ones that actually cared.
So my big question for this kind of thing is...how does someone, gay or straight, protect loved ones from harassment, theft, retaliation, etc after you're not around anymore?