Ymmv of course but I know in my experience they seldom look at them, example...last trip to dhs I was with 3 others
After stating i wanted to hit rrc first for fp they showed me how to work the system...
we got 4 fp tix to STM, rrc, tot all at the same time using their 3 tix
They used one ticket to get a valid fp for the ride the use it again and it prints a ticket saying you already have a pass, repeat at the next ride with another ticket
Show up a few minutes before entry time (11:55 for 12)
There usually is a group of people waiting so once noon hits have the tix fanned so they see the ride name and thats it
the cm just takes the passes, counts them them (4), lets 4 pass and takes the next groups without looking at any of them except he top one
So as I said I wouldn't buy them because you never know and it's not worth paying for but I have experienced cm not paying/caring attn