It is impossible to get the world to do things all our way that we like, there have to be compromises in privacy and where to go/what to do. If you were to get ebola (probably not very possible now) you would not get asked and you would show the symptoms/be so sick you would not have to tell anyone, it would be completely out of your control. A lot of life is like that and it is often easier to go along with things that do not matter (traffic cameras, they are not looking at/for you but for speeders and people breaking the law). If you want to work at certain jobs or for certain companies you have to take drug tests, not to learn about you but for them and what they do not want, since it is their company. They do not personally know/care about your test unless you fail and that just means they won't hire you. I do not like drug tests either so do not interview with companies that have them. But it is all up to you and what you choose, what you want to do and who you want to interview with.

But no drug will help with getting people to "leave you alone" and there's no way to get people to do things your way; it is all a trade-off whether we like it or not so learning to choose so I get what I want rather than trying to stop what I don't want works better for me.