Why did the Aes Sedai *not* attack?

So we've recently had a couple threads on Liandrin and Moiraine (couldn't read that one since it was all spoilers but we had Show Only discussion back closer to airing) using the Power as a weapon even though it seemed to violate their oaths. The specific oath is spelled out back in Season 1 Episode 2 when Moiraine mentions that the wording is very important:

\> Three, never to use the One Power as a weapon, except in the last extreme defense of her life or the life of her Warder or another Aes Sedai.

Now there's been some stuff I've seen that the wording may be different in the books but this is what the show has gone with and the main loophole that seems present based on discussions is that you can link pretty much everything to defending your life. Moiraine does this when using the Power to sink the Seanchan fleet (I need to do this to protect the Dragon because the Dragon needs to save the world and therefore me). And it's possible Liandrin used the same loophole against the girls (I need to do this or else the Forsaken who have ordered me around are going to kill me).

Given all of that, why have the Aes Sedai *not* attacked the White Cloaks? I don't think we're given a count of the number of Aes Sedai around but it seems very low, I'd guess around 100 or so at most. In contrast to the towns and cities being filled with background characters the Tower scenes are pretty empty. Even Logain's arrival and Moiraine's exile don't cause a gathering of any note. The party sent to grab Logain was distressingly tiny considering the power needed to hold him. There are plenty of potential channelers out there from what we saw with the Seanchan grabbing a bunch in Atuan's Mill, even if they have to run some tests like Moiraine did with her gem and Egwene the Aes Sedai could pick up people if they wanted, so it's likely that they have another standard or just don't care as much. Siuan and Nynaeve's mentor both had to travel to the Tower and Nynaeve's mentor was sent away so the Aes Sedai are very demanding and want to see that initiative but still want to remain a small (but powerful) group.

So among this small group, Valda has killed at least *7* and taken their rings. That's a massive chunk even if he's the only White Cloak doing so, and given the size of the army they brought to Falme it's probable that there are other similar ones out there. And he's attacked a woman on her way to the Tower within sight of the Tower as well as terrorizing the Tuatha'an. So why aren't the Aes Sedai going out and killing these people who are far more a direct threat than the Seanchan fleet was?

Lots of weird potential possibilities out there. The White Cloaks could be far stronger than they appear, with magic or powers to fight magic of their own. The Aes Sedai might feel that anything outside of Tar Valon is beneath their concern and stepping outside the city and getting killed is just the risk you take for mucking about with common people. Or maybe the White Cloaks are allowed to remain because Siuan and the others *like* what they're doing:

\>\[Alanna\] I got word that the Amyrlin's returning from Caemlyn. She's summoned us to the Hall... to answer for Logain. She's out for blood, looking for someone to blame.

\>\[Moiraine\] Siuan Sanche is many things... but she's never turned on a sister without cause.

\>\[Alanna\] Moiraine, this place isn't what it was when you left. You're one of the only sisters strong enough to challenge her.

What if when someone challenges Siuan she arranges to send them on a "mission" that's really a trap? Or maybe Siuan thinks that they're working for the Forsaken but doesn't want to confront them and has the White Cloaks do the killing for her?

What are your theories? Ideas on why the White Cloaks haven't been dealt with despite their threat? Remember, Show Only, saying "Oh this is all explained in the book" does absolutely nothing for the conversation especially since the show isn't the book and the explanations might not match.