Never assume that because it has the photographers name on it that it's OK because that's not necessarily the case.
Also, never assume that because you'd be OK with people using your pictures without permission that others would be OK with it.
Threads where people point out potential copyright infringements should be welcomed and really shouldn't turn into discussions on whether individuals feel the behaviour is OK or not, as it's really the photographers choice whether it's OK or not and many photographers like to know when their pics have been spotted elsewhere

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ADG