I've been guilty myself of making fake avatars both on social media and on online gaming, however, these avatars are almost always female and are built for the purpose of luring men in either to have fun with or to advertise a website with a financial motive behind it, or in the case of social media, to boost my actual ego and how attractive that I appear to be to other women by making me appear to be a "player" who has a lot of attractive women hit on me.