tail -f /dev/mind > blog
And tonight Linux showed me how much it deserved my respect. I damaged its root filesystem beyond recognition and it didn't crash. It still hasn't crashed. I looked in directories with corrupt descriptors, files that made absolutely no sense, and Linux didn't panic on me, it just reported what it could see to the best of its ability.
I have utterly destroyed the partition table on my primary hard drive. I have no backups. Don't drink and su.
Egress filtering is a good idea, and every router should implement it as a matter of course. Sadly, a lot of them don't, and it's one of those things where even if you have egress filtering working fine across your border, you're not safe unless everyone else is doing it too.