Well, judges in Maine can't impose a view on Nevada. As to proponents becoming active in more states then defenders have to become more active in states and have state legislatures pass laws defining marriage in thier state.
A Constitutional Ammendment is a hackneyed attempt to impose one morality on all people through the power of the Federal government. This is a perversion of a the intent and importance of the Constitution.
Drinking was believed a social ill and gave us prohibition by Ammendment. An utter failure that also illustrated the dangers of the Federal government imposing social or moral views upon the citizens.
Au contraire. If Maine allows Fred and Ted to marry, then this legally married couple can move next door to you in Nevada and demand that your state give them full benefits available to married couples under Nevada law.