Never. D.C. is a place where guns are banned yet every gov't building has snipers and god knows what attached to their rooftops. If shit gets outta hand, we're all either dead or rounded up and there is nothing you can do to protect yourselves. That bigtime IRS rally didn't change anything. I'm not trying to burn out this great idea. Just suggesting we try to do it elsewhere.
You need a reality check on this. One of the reasons the Philly rally was IN Philly was because the logistics of holding a large demonstration of any sort in D.C. are insane. You have to set up several months in advance, which means anything before June, at this point, is out of the question. So you might as well look at the Aug 8 date now and start filing your paperwork or you'll lose that as well.