Well, it prevents you from communicating with the sort of people who will blithely participate in these sorts of destructive systems.

More seriously, it's like an act of civil disobedience. If everybody acted similarly, we would not have these problems. Most people won't wise up until their kin are personally harmed by one of these massive unaccountable institutions, and until that happens to enough people, you have to recognize that acting in accordance with your principles will not always be the most convenient path through life.