There may be information leaking (as in fingerprinting) from your device (that you are not aware of) that would allow very easy correlation, like in a mac address or existing session cookie, similar address in a public open network or whatever you can imagine to compromise your anonymity, that gives an adversary any advance to successfully correlate your current session with one of your previous sessions.

At this event your anonymity becomes a pseudonym.

The next step would be to try to reproduce or predict behavior and setup a trigger for that information.

If the loss (compromise) of anonymity or pseudonymity may lead to imprisonment, torture, assassination or death this maybe an issue to consider.

If you try to obfuscate your access to porn, it is a completly different story.