Do you have any other dangerous suggestions? I wear two computers because I have two, which started a decade ago when my diving was more aggressive. Same brand, same settings, so they should read about the same. If not, why not? It seemed like a good safety measure. My original plan was to put the wrist computer on any assigned buddies who didn't have one so I could watch it on them, but I try to avoid assigned buddies.
It should be obvious that we are just being silly. Gary knows you shouldn't start fresh with a new computer if you lock out your first one - you simply take out the batteries in the first one for a few minutes.