SiWolKe wrote:... Behaviours of animals and the impact on environment can change if we shift them to other locations and this can be dangerous.
No offense meant, Greg.
Well, but you see by saying exactly this you imply that even harmless animal may turn into a monster if placed into conditions that trigger such behaviors. So I can say, sounds as if your own bees are plenty dangerous and you still keep them.
From my past we had incidents where bees turned dangerous (similar to what Jeff had; if in USA and now - we'd get sued, probably). But the trigger was - attempting to harvest honey during dry and hot, late summer dearth. By doing this we kind of pushed the bees into a corner. They instinctively knew they would have no chance to winter if robbed of their reserves just before the fall (no more significant flows left ahead). Until then, those bees were reasonably harmless if just left alone.
My experiences, however, come from Northern European bee beekeeping and bad behaviors were pretty predictable (basically - tit for tat).
If AHB is involved in some way - that may change the dynamics in some ways that better are avoided.
But even this you don't know ahead of time. I think it is reasonable to try a wide variety of lines and just watch them closely (say at the nuc level; nucs are just safer). IF some of them tend to become liability - terminate those.