Agree - this was the first thought I had and came here to comment on it. When using the UI it's a bit more clear: you can't click "Allow". But just looking at

Agree - this was the first thought I had and came here to comment on it. When using the UI it's a bit more clear: you can't click "Allow". But just looking at the screenshot, I had the impression this was a request dialog somehow. I thought Allow was clickable to give permission, and the X was to dismiss being told the site wanted to know about the permission request. The little X doesn't seem like a common UI element to indicate "block", but it's probably ugly to say "Allowed - [Block]". Another idea might be to write "Currently allowed" or "This site has access to" under the word "Permissions".