No, not if the job calls for a multilayer board. But I'm not going to use a multilayer board when a 2 layer board does the intended task without succumbing to or creating a noisy environment...unless that's your intent. You probably already know this, but, leaving the plane of one side of the board as intact as possible for your grounds while using the other side for the components, as much as possible, while leaving the copper as intact as possible is just the beginning. You have to keep in mind that the shape of the remaining copper is important from the standpoint of accidental antenna creation. A dipole antenna can easily be created by the strip of copper between traces if they aren't connected to the plane properly. Snubber circuits and filters are not a magic panacea for dealing with EMI issues. Sometimes they are costly and ineffective and can cost you performance. Remember when the auto manufacturers were first trying to cut the CO and CO2 emissions by recirculating hot unburned gases and adding catalytic converters? They ended up with cars that ran poorly and the lower emissions to performance ratings were abysmal. Instead they should've begun a more efficient engine design. I figger that most EMI is energy not going where you tell it.