No, you are being very smart. My parent's house got hit twice when lightening traveled into the house on the phone line. Both times they lost their tv, phones, and many other things that were plugged into outlets (and were not turned on), even with power strips. Power strips will protect items with a minor hit, not if a major lightening strike happens. So by unplugging electrical items you are making sure they will survive lightening hits.
Kat