Sugestion: Heart beats attracts zombies.

[kovalhuk 19]

So now, if I find a player with low humanity my heart starts beating. The lower the humanity the harder my heart beats.

Now the idea around it:

The zombies begins to be attracted to the beat of the heart and comes to investigate the source (fear). So I move away from the bandit to get rid of a possible zombie aggro. The hard my heart beats more attraction it will generate.

This would make criminals become undesirable in a group.

There will not be a neon around them, nor do they feel more hungry or thirsty neither need for special drugs, they simple would become outcasts of society. As in reality are.

[Capercaillie 16]

your heart doesn't beat unless you are near a bandit...?

Ok.

Have you been to many situations, where you go near another player, so close you hear that "louder" heartbeat, and then just simply walked away? I mean, is the current amount of cooperation with bandits causing trouble?