The only beneficial thing I saw of the blacket taping, was at an Indiana 1/4 mile track last outing.
Our row had a couple long blankets on the end of the aisle. The folks sitting there were constantly making beer trips and standing up. They were friendly enough as they asked us 5-6 times if we wanted a beer. Which we were more interested in racing rather than getting tanked. At least they weren't climbing over us every five minutes.
I am guessing they never saw 10 laps of racing.
I think the whole blanket thing is foolishness also. If a track wants to have reserved and general admission seating..manage it and offer it.