lol . It's quite a common reaction fom those who are inexperienced ,some mistake the genuine for natural others vice versa .
No these are genuine man made cup marks . Any experienced rock art viewers will recognise them for what they are and wouldn't even have to visit . if you look a bit closer at the cup at the top of the pic and right of centre you might notice a ring .
have a look at http://www.themodernantiquarian.com/site/14271/non_rock_art.html for more a more comprehensive look at natural markings and solution holes .