While I am as disappointed with the recent US Supreme Court ruling in Obergefell v. Hodges about gay "marriage" as anyone else, I am also leery of those (including one congresscritter) who are planning to ignore the law or advising others to do so.
This would seem an unwise course. Consider the Heller and MacDonald decisions from this court over the last few years, which found that the 2nd Amendment is indeed an individual right, and therefore individuals have the right to own firearms. Those who say "ignore the law" are creating precedent that would allow governments at any level to ignore these two decisions simply because they didn't like them or thought they were immoral.
Do you think the politicos in Chicago wouldn't love to find some way to ignore those cases? D.C.? N.Y.? You bet they would. And this would hand it to them.
This is just one of many possible issues this could apply to. So let's not shoot ourselves in the foot over this one, OK? Let's think this all the way through.