You can. If you click on the time, the comment becomes the root item and then you can zap it:

it's not ideal but it works

There's a tediously long way to zap the comment - go to kepford's bio, then posts.

Anyone know if the devs are aware of this?

I can see that I guess. I would think that if the post is by the OP it should not be able to be zapped but if it is by another then it is OK.

I'm assuming the reason is to avoid gaming zapping.