I work as a CNA and am currently going for my RN/LPN. In the healthcare setting there is a lot of behind the scenes conversation that goes on. Most of it is either completely professional or personal. Occasionally we will discuss clients, patients, or other things. But where I'm from it is illegal to give names or descriptive information about anyone. If you were in the hospital and I saw your mother on the street, it would be illegal for me to discuss your current condition with her. All health personal are considered 'Mandated Reporters'. Which means if we see anything; Physical, emotional, or verbal abuse or neglect of any kind we have to report it or we can be fired and have our licenses terminated and never be allowed to work in any setting which deals with public health ever again.
And laughing at someone I can only assume is an immediate termination. It's also illegal to discriminate for any reason in the state I live in, and I may ignorantly assume it is the same for every state, but it darn well should be. I hear more negative and bigoted comments from the clients and patients then I ever have any members of staff.
You may be looking at things from too negative of a light.

We're here to help you. Regardless of your gender, skin color, orientation, or religious beliefs. The farthest thing from my mind when I'm taking care of someone is what their personal business is. Their physical needs are most important and I need to focus on that.
I honestly believe you don't need to worry about anything, and you should never hesitate to get or call for help in a medical emergency because other human beings may not be mature and level headed enough to handle a situation. Just keep in mind, if you think someone is laughing or pointing fun at you or might do so, you're brighter than them. Regardless of what happens. Because you would never do such a thing and they have or may stoop to a lower form of cognitive processing. :3 (I.E. They're stupid and ignorant and possibly will always stay that way while you cruise along the information and education of life highway. ^^)