Dear DayZ,
My suggestion is to lock the login/logout in high loot areas like military camps or military bases. There could be a 1-2 km radius around those areas.
I want to block serverhopping, some players farming only those camps on different servers. There will be more action, if you cannot logout or login in one of these areas. For example, you track someone and the person runs into a military camp, it could be more difficult for the player to take loot away out of the camp. You have to go first to a "safe zone". This could change the gameplay and the loot situation in high loot areas.