Hi Warren,
I think IESG do ask for comments, and think that even +1 is a comment,
I prefer if the draft was a WG darft only participants out of the WG
can support. However, you SHOULD mention why you support that, is it
related to a technology, RFC or a WG works, SHOWing interest is
important to see how can the submitted darft be depended on in future.
Usually we don't want just to publish a draft that has few
interest/reason.
Overall, it is the IESG or any sender to your account that SHOULD
specify what was the request about, so as your example, there is no
harm in support,
Thanks for your input,
AB