Input of the Identity Card (Not visible!)
Verification by ID card (not visible)
In other websites there is a verification by ID card (hidden from user only for the verification) or by making a photo with the name written on a piece of paper or body part (not added in photoshop afterwards).
This can prevent many fake profile... just today I found that a person I chatted some time ago changed his whole profile overnight (an I really mean whole... now it's completely different...).
I reported him, obviously, but if one of these way can make the choice easier I think it should be considered... sending a photo of the body or of the ID card to be accredited as verified members can help us avoid fake profiles or people that every 2 weeks change their data.
The ID card would be hidden, but it would be easier to spot discrepancies like age or similar...