Bottom shelf of the fridge

Raw meat is on the bottom shelf in case it drips onto food on the shelf below. If it is on the bottom shelf, covered, and everything else is in a container or on a higher shelf, then the raw meat and the bacteria that may be on it can't touch anything else or drip onto it.

I now have a picture in my mind of the bacteria - purple and green and shaped like angry aliens, like in the ads for disinfectants - swarming across the shelf and hammering on the containers, shouting "Let us in! We are hungry! Selfish b*****ds"

I am thinking, perhaps wrongly, that if bacteria do not run around across the shelf, then there is not a problem.
I have tried googling, but couldnt find anything.

I agree with tanith. My raw meat is wrapped so is not a problem but I am still careful.

I don't think bacteria 'run around' but I wouldn't put anything cooked near raw meat , just wouldn't want to risk it..maybe put the raw meat into a proper container then it would be ok if you are really that stuck for space.