This is a full block not a warning in any conventional sense of the word, and it resembles Google but it very clearly says "Foogle" so it's not pretending to be Google, and no email or anything at all is asked from the user, so yeah it's just plain abuse of their power and very little space to argument that they are just being "overly cautious", but just like abuses by the state or the police there is always people in favor of such abuses in the name of safety.