Many thousands of people out of several billion (I assume …) Internet users is a small enough percentage that it's probably worth someone's while to make a list out of it. A sibling comment has claimed that the NSA specifically notes Tor use (https://news.ycombinator.com/item?id=11637635).
What is this based on? If it's rationality, that doesn't always apply to legal and political matters, to the very human human beings who make those decisions, or to the politial situation around them.
http://www.wired.co.uk/news/archive/2014-07/04/nsa-targeting...
If it does, it becomes an ethical maxim to use Tor. If it doesn't, then you can simply use Tor. So by case analysis you should use Tor.
This is one of the reasons I use Tor. If there is such a list, I want it to be full of people doing ordinary stuff. In effect, I want the list to be useless.
Seeking privacy should never be a crime.
http://www.thelastamericanvagabond.com/constitutional-rights...