Correct, using Tor has a chilling effect, just like using cryptography used to have. Hidden in plain sight and blending in crowd is not foolproof either. If you don't do anything wrong on Tor, you're noise. However, some signal on Tor is information I find unethical (e.g. pedophile and terrorist content). If I want such distributors to be busted, lowering Tor noise seems to be in my interest.