RE: Release'em or Eat'em
You can answer your own question by what you have stated.
The Lake/pond/body of water you are fishing can obviously handle the amount of Crappie you take out of it. Keeping that in mind, and also that the bass limit for the body of water has to be greatly less than that of the Crappie, the body of water can EASILY handle you taking fish out of it.
Do I recommend it? Not reallly. Bass become very meally and soft in warm water. They taste strongly of fish and aren't the best choice.
If I catch som legal bass through the ice, I'm happy as can be and will keep as many as I can. Spring, summer, fall... throw em' back.