Because it most likely means that people are sending data without their consent. Perhaps I am naive or just very old, but I wouldn't expect a compiler to "phon

Because it most likely means that people are sending data without their consent. Perhaps I am naive or just very old, but I wouldn't expect a compiler to "phone home" with information about what I do with it. Certainly not without me expressing consent first. So if you want that information, find a way to ask the user first. If you can give a good and understandable explanation on how the information is useful, the users might give their consent happily.