Will Congress protect the "John Does" in the flying imam lawsuit?

Powerline reports that Rep. Steven Pearce (R-NM) and ten cosponsors have introduced legislation to protect the John Does from liability.

The John Does are the citizens who were alarmed enough about certain behaviors of the imams to alert the airlines to what they feared might be a possible hijacking.
In the press release introducing the draft legislation, Rep. Pearce issued this statement:

It is a sad day in America when our own institutions of freedom are being used against us in the battle against terrorism. When I first heard about the lawsuit brought by the 'imams' in Minnesota, it was clear to me that this was an injustice against Americans who were simply trying to protect themselves. These brave citizens should be recognized as heroes for their efforts to report suspicious activity, particularly activity that has been associated with previous terror attacks.

As Americans, we must not allow ourselves to be bullied by individuals who seek to disrupt our way of life. We can not allow the sympathizers of terrorism to make Americans wonder if they could be sued before reporting possible terrorist activity. Whether it is an intimidation tactic or a full scale attack, Americans have the right and responsibility to protect themselves and their fellow citizens. I introduced this legislation to protect Americans and keep all citizens alert and vocal as they serve on the front line in our battle against terrorism here in America.