I guess the world is still learning the answers to questions like "How many times a day can you tweet before you piss people off?"
Oh, just one other thing:
He's trying to initiate social action
Well no, the political posturing is what's important here, not the question of whether some random jerk leaves a message at some random congressman's office. The point of the campaign is to try to claim credit when the eventual compromise comes through (or else to be able to blame Republicans for refusing to "compromise" when the negotiations fall through). As always in politics, what you're seen to be doing is far more important than what you're doing.
And remember that in politican speak, "We want a bipartisan compromise" always means "We want the other party to vote for our bill".
The twitter thing creates a full-blown narrative with a media-friendly hook (the media will publish any BS involving the word "twitter" at the moment) and the conclusion "Barack Obama saves the day".
Look, the whole thing is, at this point, an incredibly complicated political dance, and I've lost track of exactly who is dry-humping whom. But it's far beyond the point where you can take anything that anybody says at face value.