Using fake pictures on a dating site is misleading.
Marco is setting up a listing on a dating site and is deciding what pictures to use.
Marco wants to get someone to reply to his listing.
Marco puts up current pictures that show what he looks like today.
Marco puts up pictures of a male model that looks nothing like him.
The person that replies to his ad likes him for what he looks like now, and they hit it off.
When someone does reply to his ad, they find out he looks nothing like his pictures and stop seeing him.