[tgambill]

sure..but how to keep them safe....and control the "line" of partition. that is the problem. They will never respect any line of partition.

[GSlob]

"sure..but how to keep them safe....and control the "line" of partition. that is the problem."
If both sides are kept compact [i.e. with minimal contact surface/boundary length - the less contact, the less friction] and sufficiently strong to inflict a bad mauling on one another, they could be kept reasonably safe from themselves. The old doctrine of armed peace.