I cook rib roasts tied and have no problem getting the twine off after cooking.
I recently cooked boneless skinless turkey breasts that were netted. No bark to worry about, and the netting creates a nice, compact shape.
I've cooked netted boneless butts. No problem, either, cuz I just pull it anyway. Any bark that sticks to the net just gets pulled off and tossed into the mix.
Regards,
Chris