How ironic this came up as I was running and instructing at a PCA track today; slower car stays online, point bys on straights, in the drivers meeting they remind everyone that you must lift off the throttle when waving people past, they have also brought people in if they blatantly fail to get with the program (fortunately this doesn't happen much) My gutless little Datsun is generally sited as an example of car that is faster in corners, dog slow down the straights and 6-10 seconds a lap faster than guys in 300 - 400 hp cars. On a personal note if some guy is really plugging up the works I pull in to get some space and after the session go introduce myself to the driver.
As for the point buys what a I will say as club racer to track day participants who do not like this and it applies to most track day events, you do not wear any gear other than an open face helmet, your car has no cage no fuel cell it's not uncommon for experienced professional road racers to misread another drivers intentions and get it wrong.........new flash you can get hurt doing this.
The whole point of a DE is to give people who like to drive fast a place to run thier car without having to worrry about some RV pulling out in front of you or a tourist making a U turn right in front of you and without needing to have a race car.
I even point people by while racing because being in a small bore car in general I want you past me because you are going to be in the way mid corner. The lower powered cars are generally lighter hence the higher corner speeds.
As for being busy in a slower car; having spent spent 20yrs racing a gutless wonder production car and also having run a fast single seater, if you are racing a Miata (me), Spitfire, Datsun 1200 (me), ITB Rabbit and you can't drive the car on the limit and work out approximately where and when faster cars are going to catch up to you, either you are new/inexperienced or very likely need some coaching or should take up tiddly winks. I love momentum cars but compared to something like a Formula Mazda, D-Sports Racer or GT-1 car they are not exactly mentally taxing, again you should be able to drive them and work out traffic................ So what does this have to do with point bys at track days? Lets be honest the vast majority of track day runners, even in the advanced group, are not at the level where they can run 10 tenths and work traffic. I have run with some groups with open passing, most of the time it's not an issue but in my opinion there seem to be more guys loosing the car right after passing/being passed than I have seen at club race weekends, purely anecdotal but having also been involved from an organizing stand point do I want to see uncaged cars mixing it up wheel to wheel........not really.
Also as a former motorcycle roadracer, you only need about 14 inch wide hole to get by so passing is so much easier.
Finally I will say again DE / track day is just a chance for you to have fun with your car while minimizing as much risk as possible.......I'm OK with pulling a slide job on people in a 95 mph kink with my old Datsun but I'm pretty sure that M3 or Z06 driver won't be, especially considering like all club racers I'm going to fling rocks all over the front of your car..........do we really want this level of aggression at these events.......the answer is obviously a definitive no.
Tom