There are at least three actual possibilities there:
1. People afraid of being tracked down and prosecuted because someone used their exit node for criminal behavior
2. People concerned about limiting criminal behavior
3. People who want to stop free speech
Assuming #3 seems like a stretch even if it is easy to conclude that people pushing for constraints on free speech for the sake of limiting criminal behavior under-appreciate the vital importance of vigorous anonymous public discourse, even in countries without dictators.
1. People afraid of being tracked down and prosecuted because someone used their exit node for criminal behavior
2. People concerned about limiting criminal behavior
3. People who want to stop free speech
Assuming #3 seems like a stretch even if it is easy to conclude that people pushing for constraints on free speech for the sake of limiting criminal behavior under-appreciate the vital importance of vigorous anonymous public discourse, even in countries without dictators.