I agree with Lantley. I have a class C. I don't have a tv, microwave, slow cooker, instant pot, coffee maker, hair dryer, curling iron, dvd player, etc. My electrical use when dry camping is limited to one or two lights on for a max of maybe 1 hour per day average and charging my phone and kindle and fire. If I go somplace with hookups, I add the electric heater use if it's cold enough.
Just because I use an electric heater doesn't mean I'm using more electricity than I'm "supposed" to use.
There are many folks who will use a lot more electricity even without a heater. And what about those folks running their AC? Are they stealing?