It is literally stupid. Google just recently launched an updated version of Google Toolbar for Internet Explorer users.

It comes with a stupid new bar that appears at the bottom named Google Related.

But they forgot to add a +1 button to the toolbar.

This would have made it extremely easy for Internet Explorer users to give a +1 to any web page. Currently we have to rely on the search result pages or an embedded button.

There are unofficial extensions available for different browsers. Google however has not cared to launch their own official ones.