Of course there is risk of loss of life.
You will have at least one dam which will hold back many thousands of tonnes of water, beaver dams break and when they break they carry all the detritus which constitutes their work down stream not only causing flooding but also potential damage to infrastructure such as pipes and bridges.
Not gonna happen unless the environmentalists want a civil war.
Except it is already, look at the direction BPS is heading. NVZ's are expanding to name two. I would suggest to you that you are either incredibly sheltered or blind to the facts. The Monbiots et al have a lot more power than any group of farmers, and lets face it, they probably have a point to a certain extent.
Are you really suggesting that the protection of the environment is not important? I would suggest that even being a farmer I would value the environment much higher than agriculture in terms of importance.
Eurasian beavers do not build anywhere near as substantial dams as the American variety. The area of woodland is flat in a valley bottom over 100m wide, which the beavers will not have access to the entirely of.
Have you read my previous explanations?
I'm a fairly strict business minded farmer, but even I see that farming must improve it's environmental credentials, if only for the sakes of keeping our consumers on side.