I will take donations Dimitri... thanks for offering this kind sponsorship of 2 HD Cameras... :woohoo:
Let me start by saying Huzi, in the words of Uncle Stanley,
"there is no such thing as a truly communal Tarantula". When the going gets tough, the weak become supper...
BUT
I have VERY serious doubts if they will ever turn cannibal. Only time will tell. I do however believe that the females, once mature, might become somewhat territorial. With this I suggest that they will set up their own nest and inhabit this like they would in the wild. Males will mature and wonder, females will stick to their nest and mate with whatever passes by. I doubt females will go on nightly walks to "clean up" their territory. This will only become clear once there are a few adult females in the enclosure.
M balfouri MUST rank among the most tolerant Tarantulas of all, towards their own kind that is. The motherly devotion is rather special, the social interaction between siblings something to behold.
I don't have enough mature females to experiment with this, for example house two adult females in the same enclosure and see what happens. I will put money on them confronting each other with some sort of posturing, but at the moment, I can't see them harming each other. Truth is, I have been wrong often, so this might be no exception.
A while back, I introduced two males into one mature females enclosure. This was an extremely interesting experience, to some extent proving what I believe to be natural selection of the fittest/strongest/prettiest... not all that different to any other rivalry among males (although in humans, money seems to outweigh even good genes).
The first male started vibrating a few seconds after I introduced him into the females enclosure. The red wine then told me to introduce a second male. He proceeded with similar vibrations. The second the "stronger" male noticed that a rival is around, he turned his focus away from the female and with very similar vibrating motions, moved towards the rival male. The "weaker" male made no attempt to challenge the stronger one, but made his way out of the enclosure.
Once the coast was clear, the stronger male proceeded to mate with the female in the normal leisurely fashion.
I do not yet have experience with two adult females coming into contact with each other AND I am not about to test my theory on my females. The communal enclosure will eventually answer this question.
Once I have a few adult females, it might be a good idea to record contact between females on video... don't you agree Dimitri??