This scenario used to play out frequently on Carbon Poker as well. It's a little frustrating because it's hard to pick up any real pots since it's hard to play any real poker until the sitters start getting blinded off.
In the meantime, I would probably widen my raising range quite a bit, while making my calling range only slightly wider.
I'm going to probably play flop it or drop it.
You can count on a lot of post-flop continuation. For that reason, I'm going check/fold when I miss and avoid a pissing contest. But instead of leading out when I have it, I'm going check/raise. This should be somewhat effective at curbing some of that post-flop aggression. Once I've given them a little time to "figure me out", I'm going to start slipping in check/raise bluffs and semi bluffs and possibly leading out on my draws.
One thing to remember though, is that you won't even get a chance to really play properly until the sitters start blinding out. So it's important not to blow off your stack, trying to out aggress some agrotard before the real
poker game even starts. But don't let them hold you hostage at the table either. If you do run into super aggressive players, you're going to have to make a stand at some point. Just remember to pick your spots wisely.