i don't play with people who do that. problem solved 

even if they don't mf gear, i notice people with really bad gear (Low dps and survivability) ... i usually avoid them as well, as i rather solo farm as i can do it faster myself.

i think no mf sharing is better, because before the penalty was too high because co-op was never an option because it was a huge detriment for mf farmers.

But with the addition of paragorn 100, and no mf Sharing, CO OP is in fact a very attractive option because you can clear areas faster.

The only thing that hasn't changed is the fact some people like myself now screen who is geared for co op partnering with aka who pulls 200k+ and who are still lowbies still doing 80k.

it's more apparent for Ubers partys, as nobody will co op with anyone for ubers mp10, if they can't do 200k dmg or more