involvement in their lives? it interferes with their lives not at all. they are free to live, love, and grow old together - to get all manner of legal agreements that match perfectly the "priviledges" of marriage with the one exception that they don't get hit with a tax penalty. They are free to have ceremonies, tell people that they are married... in no way whatsoever is their action or their speech hampered. the only thing that is limited is the actions of the government official - who is tied to the will of the state populace.
but no. no no no no no. take this down to the sexuality forum where all they talk about endlessly is this One Stupid Debate. If you want to talk about whether the Federal government should be imposing a definition on the States, then that is a Big/Small Government debate and I'm fine with it. But if you want to pick up that endless go-round of any government choosing to define marriage in a way that you don't agree with, then get thee to the forum where it belongs.