Is Madagascar a dangerous travel destination?
Well danger is everywhere and I think its not that bad dangerous destination. If you're really scared of risks then you can choose non risky ares there.

cyclones can be dangerous
drivers can be dangerous
Lemurs not so much
Madagascar and its people hospitable

I visited Madagascar last year. Great experience.
Madagascar is a unique country. As soon as you enter it you realise that you are going to see something different.
Malagasy people are simple, smiling, honest and helpful. Last month I was in Tanzania and after not-so-pleasant Tanzanian experience I can easily say that.
In Madagascar there are no dangerous animals. But in some areas Crocs do exist.