party finder is not really set up that way.
It's just a tool to help make parties without having to resort to spamming in shout or something similar.
It doesn't really have any link to the content you do.

That said it really sucks just how many people outright lie about their experience and join groups they shouldn't thinking they'll just get carried through it.

Even if they did something though there will always be people that put in way more effort trying to get around the system than it would take to just learn it like everyone else.
Like today my expert roulette had a tank who was wearing full asuran accessories of Aiming to get his item level up and the vast majority of his actual armor and weapon was level 54 white gear, needless to say he was getting annihilated very quickly and yelling at the healer the whole time and ruined the group for everyone.