Sure.. but keep in mind that the cars battery uses "energy" to move it (bear with me, there is a point here). What I mean is, lets say you decide "i dont mind going to the supercharger a lot, I will use sentry mode anyway", and your car uses a very average amount of energy when sentry mode is used, of " 25 miles) worth of energy a day.
Thats 25 "miles" a day, 175 "miles" a week worth of energy, "just sitting there", but the equivalent of being driven, to your battery. Thats 9,000 miles a year "just sitting there". Not including all your extra time spent running back and forth to the supercharger, and possibly spending more money at wherever the local supercharger is, out of boredom in sitting there, you would be putting 9k more miles on your battery, which could be more miles than you actually drive in a year.
Just food for thought, as it were. The car was not designed with Sentry mode in mind, as it was bolted on "later" due to a rash of break ins in san francisco. Its best usage is "while Im at the restaurant, or at the store". Using it 24 X 7 can be done, but is an incredible amount of energy to be using, just sitting there.
Its kind of like letting a bathroom water faucet at home that has a "fast drip" just continue to drip, forever, and how much water that would end up wasting, even though it doesnt look like much to begin with.