They will beat you up using mace, batons, boots, brass knuckles and anything else at their disposal. They are the fascist anti fascists. Remember they are cowards, will gang up on you, and only attack in groups. See a lone antifa and they will run screaming.
Daniel has 60+ answers in. Politics. Not only can the new President reverse the executive orders of the previous president, but the current president can reverse his own executive orders, reinstate them, and reverse them again as often as he wants. If Obama wanted, he could reverse his new overtime standards tomorrow, and bring them back the day after.
The best it can do if it doesn't like an executive order is to pass a law to cut funding for the order's implementation. But even then, the president can veto such a defunding law. (Read more: Obama 2014: Not your year (so far): Poll) The one sure way of getting rid of an executive order is in the White House.