I'm sure BBs already have a process in place to detect dodgy bids. But really, how useful to you is the data to give you a history? Does it really make a difference to you whether a guy's current bid is the result of 100 small bids of 1k each or just one guy going in there and offering a large offer?
And yes it does take up space. You are not talking about one person but the whole transfer list. And every single bid everyone in the world makes a bid needs to be recorded. I just don't think there is enough benefit gained from something like this to justify the time of the BBs to develop it and also add to the load of the server.