Permission to fly?

sportykev thought this was worth mentioning said

Out on the island (Long Island), there are many airports. I'm outside of the 5mile range of an airport, but there are a bunch of helipads/ports around, hospitals mainly. So, I'm supposed to call them and let them know that I'm going to fly, or at least ask for permission (which I think is ridiculous). Ok, but that's life now. Have any of you called to ask for permission from these towers yet? If so, what do you say?