I refuse to implement client-side analytics; for one thing, it is a waste of bandwidth, and for the other thing, it is not how software should be designed, and

I refuse to implement client-side analytics; for one thing, it is a waste of bandwidth, and for the other thing, it is not how software should be designed, and for the other other thing, it is unethical. I do log some stuff sent to the server, as well as some stuff about the response (such as the HTTP status code, data size, timing, etc), although I do not sell this data to anyone else, and this logged data is reduced further if the client sends a "DNT:1" header. But decisions about how to make something would normally be based on actual comments by the users, rather than analytics, I should think.