She is very much aware of it. In fact, she explicitly mentions the site in the introduction chapter of her book "I, Justine: An Analog Memoir":
<quote> That's the great thing about the Internet: No matter what strange or atypical thing you're into, eventually you will find your people.
What's that you say? That sounds naive and silly? Well, have you ever heard of wikiFeet? For those of you who don't know, wikiFeet is the Internet's "collaborative celebrity feet website," otherwise known as the place for a bunch of lovable weirdos to celebrate and share their foot fetishes with the world. (Inexplicably, there are 612 photos of me -- er, my feet -- on this site.) </quote>
Xander Castle (user)2015-11-23 09:30:25
That's another reason why I like her. She's one of the few of these internet "celebrities" to end up here to embrace that fact and maybe even like it. Sure she called us weirdos...but she isn't really wrong.
Weirdo is an objective opinion. I just love feet, boobs butts nice teeth and eyes, the foot is just a part of the body. I just think Justine has very attractive feet and would like to worship them and not in the biblical sense.