Yup. So many work arounds. Simply the IP+UA alone contains enough entropy to uniquely detect the majority of users already, you don't need to store anything at

Yup. So many work arounds. Simply the IP+UA alone contains enough entropy to uniquely detect the majority of users already, you don't need to store anything at all. ETag cookies work quite well too and don't require any additional software or "hacking"-esque approaches.