Picking up open time during while a furlough is in effect is like slapping your fellow pilot in the face. Let the company live with the bed they made. They can assign reserves, extend pilots already flying or attempt to junior man. Anything with your CBA. If anything the union of they had a pair, would be trying to negotiate a reduction in hours per line to try and get some guys or gals back off the street. If you want to talk the talk about sticking together as a union group, then WALK the freaking WALK and take shared sacrifice to better the whole group.
rant over.
Merry Christmas