Sure. It's usually good practice to name a DOM el class semantically, eg. describing what the element actually represents instead of what it is supposed to do or how it looks; So what happens when we click that element shouldn't be described by the class name.

So the HTML could become:

```html
<a class="user-entry" href="#" rel="<%= nick %>">
```

The event registration:

```js
events: {
  'click a.user-entry': 'clickUserEntry'
}
```

The event handler:

```js
clickUserEntry: function() {
  if (!this.isInSidebar)
    window.close();
},
```

While this is nitpicking really, I think it more decouples things a bit more accurately.