If so you must know how intimidating it might be at first.
Can you imagine playing in front of thousands and realizing there are maybe millions watching you on TV all over the world?
Do you wonder how these tour pros get used to that? Or do they?
In my opinion, if you play enough in front of that many people it probably sort of minimizes the sensation and you probably rather quickly learn how to go into something of a bubble the way those maddeningly followed tour players do.
Nevertheless, they always amaze me how well they seem to handle all that, particularly on tees where so many can be so close.
What do you think? How do you think you'd respond in their positions? If you had to do it fifty times do you think it would become second nature to you? 
The absolute scariest moment I've had was in 1968, we were doing The Swing's the Thing Golf show for BOAC with John Jacobs at Sanddown Park or something named like that near LONDON England. It was on live BBC, tousands of people watching, and as we did unison shots (five pros hitting at the same time) the crowd kept creeping in from the edges. My position was at the end, on the left side of the range. We were hitting full 5 irons and I had to actually pull my shots high OVER the heads of people 20 feet in front of me! the toughest thing was to keep our swings "in unison", I am sure the people had no idea how close they came to being caualties. After that experience, teeing off in the Canadian Open or any other event was dead easy.