It sounds like they're complaining about this blog post, where the Tor project disavows use of their software by neo-Nazis, child pornographers, and other assorted deplorable people: https://blog.torproject.org/tor-project-defends-human-rights...
If Tor is to remain as an acceptable thing to run and use, the Tor Project can't outwardly espouse ideology that drives away the normal users that allow Tor users to blend together. Those browsing Tumblr over Tor, shitposting on Reddit, watching YouTube, etc are key to retain so as to normalize the use of the Tor Browser Bundle.
And even so, note that that is not the same as blocking 0.15% of users, which is impossible.