The Patriots sign guys like this only to cut them shortly thereafter all the time. The instances where they stick and produce are much rarer. They like to throw a lot of stuff at the wall and see what sticks.
They have how many SB appearances? Maybe its not such a bad strategy after all.
And before you reply I will anticipate your rebuttal...its not likely that signing marginal at best free agents has contributed greatly to the Patriots successes.
I'm just saying there are worse teams to emulate than the New England Patriots.
But you are right. It's like BB treats that last roster spot as a drive through.