The license says to "keep intact" all copyright notices. My layman's assumption would be that means scrubbing is a violation. It also says a lot of words that s

The license says to "keep intact" all copyright notices. My layman's assumption would be that means scrubbing is a violation. It also says a lot of words that seem to come down to "if you put your copyright notice in, then their attribution has to be at least as prominent." http://creativecommons.org/licenses/by/3.0/legalcode http://creativecommons.org/licenses/by/3.0/legalcode -- section 4(b) All said, though, it's sketchy practice no matter what the license says literally. A main purpose of CC is to give you a license that can be followed common-sensibly. Playing "lawyer' with the wording isn't reciprocating the goodwill of the author.