Is it o.k. to do Fluther while at work when you have only been there for a month?

My husband, I see, has been on Fluther quite a bit at his new job. He doesn’t have his own office and I am not sure what he should be doing. I just don’t feel it is appropriate to be “playing” while on the job this early in the game. This is a GOOD job and I don’t want him to screw it up.