The Pats are not going to waste time working out a player they have no intentions of potentially signing in the middle of the season when they have a game to worry about.
I think people are simply having trouble dealing with the fact that once again people are mistaken when they think BB only looks at so called "Patriot type players". It turns out Belichick is far less concerned about a player's perceived attitude than the average poster is. Belichick only cares about one thing - "will this guy help the team or not", and takes everything into consideration. This was proven with the Dillon trade, and only recently has revisionist history led to the crazy notion that Dillon did not have a perceived attitude problem before coming to the Pats. The bottom line is, if Belichick and Pioli think Charles Rogers can help the team, they will sign him. If they don't, they won't, but they aren't going to let two collarbone injuries and an affection for marijuana scare them off of a guy with a huge upside that they can basically get for free and let go of if at any point in time shows the same immaturity he has shown in his first 3 seasons.