It's worth remembering that C3P's definition of "child porn" is very broad to the point of being useless. So, if someone is sitting in a room fully clothed, that can be "child porn" in their eyes (yes, there have been recorded cases like that). Whatever their reasoning is there, it is silly to scream at someone for not removing a particular item like that from a site on the spot.

In one case, they appeared to be uploading the images themselves to a search engine, then reporting them to get them taken down (even though they were only transiently cached in the search thing for minutes at a time). This is extremely problematic as it creates room for scandal over nothing.