Piwki opt out/cookie less

I have a client that is very concerned about privacy and have chosen Piwik over Google Analytics because of the privacy features.

When I click on the “opt out” option in the iframe I get the piwik_ignore cookie, but all the first party and third party pk_/piwik cookies remains. Shouldn’t they be removed when I opt out?

Another alternative is to remove cookies entirely from Piwik (as mentioned in another forum post), but what will the consequence be? Anyone tried it?

Thank you in advance for any help!

-Alexander

See the feature request: New Privacy feature: "Disable all tracking cookies" (EU Privacy regulation update) · Issue #2772 · matomo-org/matomo · GitHub