I suggest this is overstated, at least as far as Tor is concerned. While there are occasionally news reports about various crimes that utilized Tor as part of the process, more often the generic term "encryption" or "anonymizing software" is used in news reports. I think the general reaction to anyone wearing a Tor T-shirt would be indifference, save maybe one or two curious talkative parties.
I will admit this is anecdotal, but overwhelmingly when Tor has been brought up in the past in my workplace or during discussions, overwhelmingly the response has either been "what's Tor" or "oh Tor. I've heard of that. What is that exactly?". The idea of "expelled from student union" for being a Tor Supporter is completely outside of my understanding of what people in the US even know about Tor. Even so much as having a casual two-way conversation with a non-tech person about Tor seems like a foreign concept. Tor might catch headlines once in awhile, but when it comes to things like online privacy and anonymity, I don't think this is what the lay person thinks of.
I mean, just page through news.google a bit searching for "Tor". The news outlets covering it are pretty much tech-oriented; going just a few pages deep, only politico really mentioned Tor, and that was literally only to say it was used by the hackers during the Clinton email breach, calling it an anonymity tool.
I just don't think there's enough evidence to really say that the general public or even law enforcement really knows what Tor is, much less form an aggressive opinion towards supporters.