As the club owner, you can remove someone but this probably happens rarely. As for players leaving there are many reasons, but probably one would think the member should contact the owner prior to quitting if there is an issue. In my case I was disillusioned creating events for lower tiers, only for the higher tiers to play (despite the Title of the tourny). I contacted the owner, nothing was done so I quit,
The easy answer to prevent speculation would be for WGT to show this in their activity - when I quit my CC there was no mention on my activity