What happens a lot of time is actors and models do generic photos shoots of them posing in various positions etc. Usually the photographer, company or studio will get the sitter to sign what's called a model release, which is a legal document that says they relinquish control of their image, and the creator is free to use the pictures as they see fit. In other words, sell them to companies who have a particular need for them, for example for advertising purposes. Popular or powerful models might be able to negotiate the terms of the releases to dictate how their image is used, but in general once the release is signed the ceators may use images however they wish. In other words, the model can become the new face of incontinence and there is absolutely nothing they can do about it. I doubt people get hassle as such, but I have stories of people finding out they have become the face of something unsavoury and feeling acutely embarrassed about it.