I don't think of Pacman as a "user" when I hear the name Pacman I think of a boxer/fighter who holds nothing back and his effort is max all the time.
As to Floyds demands on testing Manny simply stated that the commissions rules as to testing was good enough for him. Floyd could have and should have approached the commission to possibly install an added test! That way theres less "demands" on a contract and its much less personal. Mayweather could have brought attention to instituting a better more thorough way of testing instead of attacking their contract with unrealistic demands.
Personally I think it was just another means that led to Floyd ducking the guy! When Manny came back and said he'd take any test and offered a 55% to 45% split Mayweather still ran from that. Its obvious to anyone who has listen to this BS over the years that Floyd wanted NOTHING to do Manny in a ring! Ray.