//server
playerserver addeventhandler ["handlescore", {diag_log _this}];
playerserver addscore 20;
EH handler will show something like
[B Alpha 1-1:1 (KK) REMOTE,<NULL-object>,1]
but the MP score will be 20.
can achieve the same on client, only the score will not add to total
player addeventhandler ["handlescore", {systemchat str _this}];
player addscore 20;
[B Alpha 1-1:1 (KK),<NULL-object>,1]
kinda redundant functionality.