There's definitely a potential problem there, and one that will probably be repeated in similar circumstances in the future. Seems to me that the best thing FB (or anyone else) can do in this situation is to remove oversight for posts made by both sides from regional offices in the area in question and hand them off to more neutral offices, at least for posts concerning the conflict.
Adblock and no script do more to keep viruses out of your stuff than antivirus.
That's actually a very good point. I haven't had a single alert from the AV component of my security suite (software on PC, host and hardware firewalls, etc.) for longer than I can remember, and that was a false positive from an installer. Then again, I whitelist cookies, JavaScript, Flash, etc., block all ads, treat all links/files I get sent with a healthy degree of skepticism, and don't tend to visit sites usually regarded as "suspect" (compromised is another matter, of course), so even the likes of SpyBot S&D and CCleaner seldom flag anything. Given how ineffectual AV is against the latest 0-day vulnerabilites and drive-bys, I'm giving serious thought to just switching off the real-time scanner and running a manual scan every week or so for peace of mind.
"Conversion, fastidious Goddess, loves blood better than brick, and feasts most subtly on the human will." -- Virginia Woolf, "Mrs. Dalloway"