One example is a peanut allergy. Yeah, it's tragic and can be fatal. I am sorry, but it is the responsibility of the person with the allergy to make sure they avoid peanuts. It is not my responsibility to protect them. I am not going to walk around chanting "Unclean!" so that those who have to avoid peanuts will stay away from me.
Another example is "gun control". Yep, around guns some people will do the wrong thing. That is NOT my fault and I resent being punished for things I did not do. I am not going to walk around chanting "Forgive me- I own guns!" so that the State and pathetically damaged individuals can attack me for being a responsible person.
Everyone has defects that they might prefer that others cater to- some of these can even be fatal. But it hurts us all to demand we order society around the problems, rather than expect those with the problems to order themselves around healthy individuals.