Okay, 'easy' was definitely an exaggeration, however it should probably be doable, given that Google already takes website age into account while ranking search

Okay, 'easy' was definitely an exaggeration, however it should probably be doable, given that Google already takes website age into account while ranking search results. I presume they have anti-plagiarism measures in place already, as otherwise obscuration of ranking rules would be trivially avoided by content theft.