"So," says Bella to Rúmil one afternoon, "a few weeks ago I told myself that if in a few weeks I had not come up with an actually good way to bring up a thing I would just mention it anyway on the grounds that if it came up somehow later and I had not done so that would be weird."
"Anyway, yeah, one's loose, we're sort of academically curious how evil he is at this point, when does that start?"
"...did that fail in spite of Lúthien as proof of concept or are some running around?"
"Oh well. Thanks anyway."
And this information is propagated to the peal and Elspeth takes a moment to earwire the Telperion Valar in case they were curious.
...Boots starts working on an anti-teleportation spell that could be cast on Sauron and is specific to wizardry teleportation so he can still be moved by other means.
Few weeks, but we can't move the planet and can't guarantee being able to catch him inclined to stay substantial so it's not a complete solution.
Don't have a way to target the people over the whole thing in one go, not-in-one-go would constitute warning, and anyway if Vulcan and Afterlife are anything to go by they'd probably object to losing their animals and stuff.
And he is a Maia, he's not aiming to do harm on a short-term scale or he could have already done a lot of it -
Didn't the Space one get elected orc president without even rigging it? Maybe they get off on at least one thing that is not inherently evil.