Laurie Forbes wrote:

One weird thing about TBird is that it will only let you delete your own
posts (at least as far as I can tell).


That's not weird. You have no right to delete someone else's messages
from usenet. At one time NNTP servers allowed you to delete a post sent
in error, or that was incomplete. Most NNTP servers no longer honor a
cancel message (delete).


--
It's easy to think outside the box, when you have a cutting torch.