task_lists extension - can checkboxes be enabled?

[bartonc-javs]

When I render the following markdown to html

* [x] Checked
* [ ] Unchecked

I get

<ul class="task-list">
<li><input type="checkbox" disabled="" checked="" />
Checked</li>
<li><input type="checkbox" disabled="" />
Unchecked</li>
</ul>

Under normal circumstances, the disabled attribute makes sense, since there isn't any way to make the rendered html interactive. The problem is that the styling options for disabled elements is very restricted, and I'd like to add a yellow background to unchecked elements to make them more visible.

Is there a way to remove the disabled attribute? I suppose that I could write a javascript template, but that seems like a hack.