It shouldn't be up to the hospital staff.
They shouldn't be there. You don't see people preying upon vulnerable patients in other parts of the hospital - the geriatric ward, the childrens' ward perhaps - in order to harvest information from them for profit or to sell them things when they're not in a position to make an informed choice.
The women on PN wards are usually too unwell or too vulnerable to have a 6hr discharge. They've had anaesthetics, operations or medical procedures, drugs, no sleep for days, they're in pain...these are women who should be protected from salespeople in these vulnerable hours.
If you want nice pics, get a friend or relative to take them, take them yourself, don't pretend this company is doing women a fucking service when in fact they're doing the bloody opposite 