Show available commands in block

We now have /kick, /ban, /block, /invite (more?). I'd like to expose these to users in the Who's online block for the current chat. my thinking is to add 4 radio buttons grouped into an radios form element called Action. The kick and ban actions only appear for admins. Below that, we add a username autocomplete textfield. Below that, a submit button.

One alternative that folks might like is to add a k and b link (right aligned) beside each name in the block. by clicking on those, admins issue the appropriate command. we still would need a username type in field for inviting users and blocking users.