Do you mean veteran rank in game? Even if i agree, this will not work, they can use mod to boost level like i did after i lost mine profile and started over, or they can just use profile that is already higher lvl. The better solution is to increase the hours played time that is requiered to join MP it was 2h only when i joined.
90 too slow? You joke right? Do you know that this is not a racing game?