Per @lucky760's comment,
It was decided years ago those are far too easily abused, but hey this is a meritocracy. If the constituency stands united with a single voice, perhaps the site admins would reconsider the issue. Maybe start a poll.
I'd sometimes like to embed images in comments, and I think that the existing hobbling/banning options would be sufficient to deal with abuse... but then, I'm not entirely sure what type of abuse @lucky760's worried about? I would think that it would be similar to embedding any video source (requires gold star).