Heavy pax need to step on the scales, they all tell lies, anyway.
I did have a fine big Scotsman as a student, about 20 years ago, at Booker; aside from being too heavy, he was also too tall. So both of us flew without parachutes, and he flew with his shoes off, in his socks, and went solo in 23 airtow flights.
Flying without parachutes was quite legal. I couldn't really ask him to fly without a chute if I continued to wear one....imagine the conversation if we both tried to bail out with only one chute between us!