Using a date-modified header to detect unique visitors without using cookies
Threads like this kinda make me sad about HN. Every single comment is about how this technique might possibly be abused to track users in very specific scenarios (i.e. you may be able to identify your most active user).<p>If a web server wanted to track you, they would just use your IP. This is a clever technical trick to count your number of users without collecting any personal data. I don't understand why that is such a bad thing?