Not stopping people shooting free to get portfolios.
My advice for such case:
1. That newbie or whatever go shoot free, please do not give them any images, shoot is free but images must charge. Per image bridal shop is charging $80, so you can charge them the same rates.
2. List down the details in contract, failing to do so you may end up in bad situation.
3. Always ensure even shoot free, tell them a must to hire an make up artist, it helps. (Imaging shoot free for portfolios, but bad make up cannot produce good results).
4. Good to states the duration, you wanna wake up 2am for them??
5. Since it is free, and most likely no contract, you are entitled to shoot as you want, disappear as you want. If you think you have enough shots, wanna stop, please stop. Do not need to listen to them.
PLEASE REMEMBER SHOOT IS FREE BUT IMAGES IS NOT!!!
point no 5, should be modified to I shoot at my own 'FREE' time(since its gonna be free anyway) and FREE will and anything I wanna shoot...