This happened maybe 3 years ago at my local A-Tier.
First Problem: There was no players meeting before this round. We were playing multiple courses and they spread divisions across 4 or 5, so each course required some sort of TD/Assistant TD to host a players meeting before the round. I was actually at tourney central when they called the players in. Maybe 6 or 7 guys of the 75 or so in MPO showed up to the meeting. The Course TD basically said, "well, no point in a players meeting since nobody showed up (huge mistake). Do you guys have any questions? Nobody did, so we all went out to our holes. I was local and knew the course well.
We then come to a hole with a mandatory "pole" that is in place to prevent players from throwing over the road. It's been there since the course was put in and is always in play. The 4 of us discussed it prior to throwing the hole. It was not in the caddy book and a guy from out of town noticed. We all assured him it was in play. I missed the mando like a chump. Out of town guy also missed the mando. He was also up at tournament central when they decided not to have a players meeting. So even though the pole exists, and a drop zone next to it is spray painted, and we talked about the damn thing before playing the hole he decides to argue that it is not in play. He has a point of course, but the guys on our card, including me, are giving him the "come on man" speech. He demands to play a provisional and even though I hate it, I have to back him because of the whole caddy book and lack of players meeting thing. I told the guys we will just play it out and ask the TD, so everyone agreed. Now I'm sitting there - also missed the mando, and this guy is playing a provisional, so I feel like I have to as well. It's a simple up and down from the drop zone and we both park it. He then makes a nice putt for a 2 from his original lie. Keep in mind this guy was really whining and rubbing the card the wrong way and I was playing with guys I knew and considered friends. My original drive is inside of 20 feet and I kept thinking if I make this, and he gets his way, then I have to live with the fact that I "cheated" (in my eyes). I went ahead and 3 putted so I my score is a 4 either way.
This guy kept talking about it until my buddy told him to shut up about it until the round was over and we would get with the TD. He was basically trying to sell the card on it in hopes he would win the argument after the round.
We approached the TD, and explained the situation. The TD was like, "So it was announced a mando before you threw it?" He said yes. "And you are arguing not to play it". He gave the speech. The TD called someone with the PDGA as we are all sitting there and they made a ruling in like 10 seconds and said something to the effect of his card mates announcing it was enough and he would take the 4. I seriously thought he was going to cry. I think he said he would "petition the ruling".