Unfortunately some of this comes with the increase in popularity and bigger crowds.
Another area that needs more attention is the spectator lines along the return roads.
I set up my stuff on Friday behind the banners at the point marked "no spectators beyond this point" that I believe was intended to create a large easy to handle turnout for the folks at the fuel station. When I showed up on Saturday, someone had turned the no spectators beyond this point sign 90 degrees and placed it in line with the cone line along the edge of the spectator area, and a half a dozen huge RVs were set up in what should have been a no go zone.
The other really irritating issue along the return road is that some of the spectators think they are special and deserve to sit 10' forward of every one else. As a result you get a leap frog effect where some of these "special" spectators gradually creep out well in front of the marked line.
It would really help if someone would patrol that part of the return road early in the morning, up near the pits and fuel station and tell them they have to pull ALL their stuff back behind the cone line before racing will start.
There were also a lot of kids on small scooters and bikes zipping in and out between the spectator shelters and out into the return road. I was actually surprised no one got clipped by a car given how far some of them were zooming out into the return road path.
Once you let that sort of disregard for crowd control boundaries go for an extended period of time, people start ignoring all the signs and rules. Better to nip it in the bud early in the day so you don't have folks getting the impression that the crowd control rules and boundaries don't matter. Several announcements on the low power AM radio station targeted at the spectators would also go a long ways in reminding folks that the cars have very limited visibility and when in tow cannot stop suddenly and therefore have absolute right of way over all other traffic.
Add in a plane using the entry road as a taxiway and you have all sorts of things folks need to watch for.
Larry