I'm sure too! But there are some very important differences with Stallman's use and "my" use. Personally I use WGET all the time to get specific stuff, mainly downloads of binaries say for some UX system I'm setting up. I'm fairly certain that this is the most common use of WGET, so all that can easily be filtered out. This leaves Stallman's use case, and a few other secretive users, whom I'm sure can also be divided into separate categories, that can then be used to further identify each user's uniqueness. I'm not saying that it's easy, but I'm saying that he's got a higher chance of getting "caught" simply by revealing his rather unique use case.