I would really love to have that feature. I would make debugging much more easier.
However you can use it right now. To work around you can use Mutation events.

Check out this jsfiddle: http://jsfiddle.net/ovkadurin/j6twwym5/
In there I catch the case when the inserted element is <a> and its text is "hello".
In order to use it without any changes in the source code you should use snippets.  

* It would make debugging much more easier.

Here is a link to the jsfiddle that doesn't contain event listener in its source code https://jsfiddle.net/ovkadurin/m3huyjkn/
Instead insertion event is listened using Snippets. You can also check out animated gif in the attachment.

Deleted: conditional_dom_bp.gif 1.1 MB

	conditional_dom_bp.gif 1.1 MB View Download

Confirming the issue as this seems to be a feature request.

Waiting for more inputs on this