Just support and encourage the practical uses of the modes - FPO/SPO is for xping. MPO is for meeting up with new people (social activities). That would be logical thinking. Illogical thinking is attempting to force use of a mode in a way that the mode is clearly not designed to be used - you can't force a bunch of people together onto tiny maps say "ok now we forced you into this tiny space go kill each other and fight over very limited numbers of targets" and expect everyone to stick around. This is not a jail and nothing is keeping any one of us here - if the game isn't fun people will not play it. Make better use of social activities, let us choose modes upon entry to maps without needing to log out all the time, and you'll get people in MPO.