[ndriscoll]

When a site wants access to my camera or microphone, the browser detects my consent by asking me. I don't see why listening to clipboard events shouldn't be treated in the same way. Likewise with mouse and keyboard tracking events.

The number of sites that reasonably need to know when I copy/paste or need to override what happens when I do that is approximately zero. There's no reason to allow it by default for all sites.