IMHO, each case is unique.

I know that our society is slowly criminalizing any single tiny risk (when people die by the hundred someplaces else, btw), and that it has to be tampered (not sur about the word): I mean, if I were a doctor in certain places, I would refuse to take care of people, because I could get so many lawsuits... And I think that this is bad

However, about this TB infected person flying over the seas uncaring, I won't say "well, no harm, no foul". This is madness. Of course being rejected because you're sick must be hard. Does it give you a reason to be irresponsible?