Well I guess the proper thing to do would be to report that multi-accounter to wgt but you have to make sure that you have cast iron proof or they won't even look at it
I know its almost impossible to obtain but nothing less than a screenshot of a full confession will do..... hang on.....no..... from a past experience I can tell you not even that is enough so I'll have to revise my advice.... don't waste your time, tell the Master in your club to get used to sucking it up, swirling it around his palate but to make sure he spits it back out or it leaves a very nasty taste in your mouth.
I wonder who that could be MB?.... Nah he wouldn't dare lol