In my PCB layout software, on two-sided boards, there is the option to hide individual pad rings on a layer. I am using all through-hole components, and do all the soldering on the bottom layer. My question is why shouldn't I hide all the pad rings that aren't connected to traces on the top layer? This makes routing the top layer easier because the hidden pad rings don't take up surface area, which allows more room for traces. Am I overlooking some reason that I should leave the pad rings on the top layer? Thanks.