Bantz score must be dynamically updating, which is more than possible with current tech.
Like if you just walked away from a total gammon with no bants except ‘Paki jokes’ you can hit him with a 2-star rating as soon as he walks out the boozer.
(he does get a couple of stars because his ‘Did you hear about the Pakistani opticians that burned down? Asif Eyecare’ joke was at least good)