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You could test if the md5 of the data returned is eebc93350a68a64022b7482f460017ba (known to be the "image not found" image) once day or so, and auto 'exclude' bad ads. That would be quite a bit of work for something that's rarely a problem, easily spotted, and easily dealt with manually.
@ShaneMadden I'm really not sure how to explain it, but I've seen trends where I get all back-to-back community ads, and other times I get none for hours. Might have something to do with the questions I'm looking at, or the IP I'm coming from, or maybe there's trends throughout the day... But they're definitely working right now.
@scottishwildcat Nope, the CDDL does not allow you to use the covered software if you impose new restrictions on it. Proprietary and infectious licenses like the GPL need not apply. Same reason the BSDs and OpenSolaris derivatives get along, they can freely use each others code.
