My understanding of cloud flare is that they null route you if any major attack comes in- Seems a little bit unfair they didnt do this for lulzsec just to get the press. If you are some boring website that gets the same attack lulzsec does, they will just disconnect/nullroute you. Correct me if any of this inaccurate, but last I checked it was not.
We only force a site direct if the attack is too large & starts to impact other customers as well. If the attack doesn't impact other customers, then we won't force the site direct (we generally only force a few sites direct per week & these are monster attacks).