Had numerous issues this past weekend at a sanctioned tourney with people showing up and just playing, completely ignoring the "course closed for tournament" signs. There's 3 courses in the vicinity (even more going half-an-hour out), and 2 were being used over the weekend. We had some guys on one hole that were just holing out, and we knew they weren't playing, so we hollered to them from the tee that the course was closed; one guy kept walking to the next tee, the other marched back towards us on the tee looking all pissed off and was like, "What do you mean it's closed? That's dumb. We were out at the other course and they had a tourney going on there. That's dumb to have 2 tourneys on the same day." We explained it was the SAME tourney occurring on 2 courses, to which he replied, "Well, that's dumb." He just kept saying how "dumb" the whole thing was. We directed him to tourney central to talk to the TD, implying that he should quit shooting the messengers.
A few holes later, a pretty cute girl with 2 younger kids started approaching the tee. We told her that the course was closed, and she said she didn't see any signs, and we told her there WERE signs, and just said, "Hey, we're just informing you. If anyone else you encounter is a dick about it, you've already been warned." So she waits for us to tee off; we barely got to our tee shots, and the two kids were throwing on us!!! We all turned back and just kind of shot her a collective look saying, "Hold the f**k on!" and she kept yelling at the kids to quit throwing (they were each throwing meat hooks about 50' to 60' per toss, but still gaining on us at our slow tourney pace)--while she kept throwing on them--and it kept going on through the entire hole up to our putts. I was lining up for my 6' par putt, saw 2 discs flying at me in my peripherals, and I just stepped back and glared up the fairway at this most inconsiderate group. They didn't follow us to the next hole, but we saw them later on, so they must've skipped us and tried another hole.
But yeah, as far as my local course I don't have an issue since we're a rural community sandwiched in between two cities with very popular courses, so on weekends the more serious players will flow into Cleveland to get away from the two-disc DBs and large groups of kids, which of course I welcome since the most traffic I ever see at LTC is maybe 6 or 7 groups out playing.