understand that they are not happy because they did not hurt anyone and that friendly banter between 2 players that are in on it is not breaking the rules according to the new staff ethos
zarpgaming.com/index.php/forum/darkrp/59861-ssrp-staff-ethos
if you see a rdm then confront the players and if both confirm that its simpel banter then its fine
no need for further action then just you to keep it in mind for the next time