"Ermahgerd! I'm going to have to reselect the wireless network on my PC and type the passphrase in again! Oh, who could have initiated such an atrocity!"

Nah, but seriously, that shouldn't cause any problems. It's so easy to reconnect a computer, even my mom has done it on her own before. The only problems you'll run into are not being able to change it to WEP, or having an ancient device that doesn't support WEP.