Penn and Teller, libertans

Penn and Teller are two guys who's mission is to let people informed of fraudes, searching for 'trues', etc. in an entertaining way.

Industrialized water versus tapwater


It's good that they let the 'individuals' be informed in  'their' truth in certain sciences, that's why the entertainers are called libertans. But they criticize sciences, religions and economic issues that can undermines whole societies (read: freedom of the individuals to group and gain money, freedom to choose).
With other words, sometimes they speak against themselves.
Isn't that free opinion has to survive when these opinions have to be discussed with each other(s).
Otherwise this free opinion has no meaning at all.
People need each other to survive, isn't it? Or you'll be rather be death.
For example: if you live in an environment where people have a home, garden and a car, your neighbour want's to copy you, otherwise he/she will be jealous...
Take 5 friends/acquaintances in your near area and you're the average of them...