As long as they're well fed why would they try and bite a human. Assuming you don't play with rodents prior, I doubt they'd associatte you with food.

I once was feeling psycho, and I put a rat in front of Monty, and he went into instant hunt mode. Then I put my hand in front of him to see if he would associatte me with food (he was smaller....). Anyhoo, he smelled for a few seconds and turned around to get his rat. Even when in deep hunt mode they know whats food and what isn't.