Having built a system which does this, here is what I need you to do:

Step 1: Open an incognito window and watch some british milfs getting creampied by black dudes.

Step 2: go to cuteoverload.com and tweet the URL of some snuggly G-rated kittens.

I've now fingerprinted you across both xhamster and cuteoverload.

Additionally, once you tweeted something on cuteoverload, I just learned the the tweet_id of something attached to your twitter handle, which I tied to your browser fingerprint. Provided the tweet is public I can then get any personal info you make public in your twitter profile.

Pretty straightforward docs on how to do it: https://dev.twitter.com/web/tweet-button https://dev.twitter.com/web/javascript/events

I believe facebook offers similar data via the api (not sure if it includes your id), never tried to do it with pinterest.