If the only factor they're ever tracking you with is your fonts, then yes, you're correct.
But what if you have the same IP address, user-agent, and plugins for a week, and midway through the week your font fingerprint changed? Then they just go and tie both fingerprints, or repalce the old one with the new one.
In reality this is not going to be a problem for any web service that seriously attempts to track users, and there are multiple such companies that are doing so and don't let this stop them. Usually only one fingerprint will change at a time, which makes it easy for them to account for it.
The only good solution is to prevent them from capturing that information in the first place, and the only way to prevent it is to block Javascript and Flash, which is most easily done with NoScript.
But what if you have the same IP address, user-agent, and plugins for a week, and midway through the week your font fingerprint changed? Then they just go and tie both fingerprints, or repalce the old one with the new one.
In reality this is not going to be a problem for any web service that seriously attempts to track users, and there are multiple such companies that are doing so and don't let this stop them. Usually only one fingerprint will change at a time, which makes it easy for them to account for it.
The only good solution is to prevent them from capturing that information in the first place, and the only way to prevent it is to block Javascript and Flash, which is most easily done with NoScript.