[mibbitier]

The worst implementations "drop down" a message at the top of the page to tell me they're using cookies. This invariably happens just as I'm clicking on a link. The link moves, and I click on some link I didn't want to click on.

There are no words strong enough to describe how shitty that is, and it's incredibly common, on big, widely used websites.

[PJones]

Recently became required by the EU for all websites to notify users of cookies, so don't expect the notifications to go away. Better implementations don't move content around the page though.

[mibbitier]

I expect us (UK) to withdraw from the EU in the next few years, so hopefully it'll become irrelevant.