I think it's a challenge to judge the actions of a widow of the September 11 terrorist murders.
She may have been given solid legal advice to do this because she is not getting the monies promised to her by the American Red Cross and the United Way. There are countless threads here about how these giant charities are holding back (and earning interest on) the payments of the funds made available by generous people all over the world. The widow's state of mind may be completely out of focus because she has bills to pay and she's alone. If anything, I bet there are trial lawyers who are salivating at the chance to sue these airlines. Blame them before blaming the widows.