These people may have been sharking intentionally or unintentionally, but I know this I'm always really surprised when I go there with the amount of moving about that people in the room do despite the fact that there is a high dollar match going on. If you want to come and go between racks no problem, but I always see several people just coming and going as they please while one guy is at the table.
I know! It amazes me how much pool players whine and cry about people moving around, talking, etc... Bunch of ****ing babies!!!! Probably not the whole reason, but I'm betting it plays a huge role, in why the Phillipines always have a strong showing in any tournament anywhere.
In Danny Basaviches book, he talks about how they would scream, holler, jump around, etc..while the other guy was down on his shot. The reason behind it, was to shark proof themselves.
Nobody can shark you but yourself. Period!!!