http://blogs.esa.int/rosetta/2014/10/03/measuring-comet-67pc...
We could put a self sustaining base on it or on similar comets in the future.
Otherwise it's fine.
Nobody is going to walk on it naked. The conditions on the comet are amazing compared to the ISS, which is currently supporting life.
The comet has everything you need, water, organic material, shielding from radiation, decent size, raw material, energy.
( I'm not trying to be mean, that was just the impression I got. )