I belive it would be a better idea to have the delete button in the guild options or some other place so you still are able to quickly delete multipli posts. - Voting no

yes!

yes

probably with a way to delete multiple posts at once?
if someone wants to delete multiple posts, the popup would be extremely annoying.
a checkbox next to each post and a "delete" button at top and bottom of the guild topic or something like that would work