To all the people saying that he was just playing sloppy, sloppy play is no excuse. This is a competitive REL event, if you're playing sloppy you don't deserve to win. Everyone needs to be doing their part in a competitive event and calling judges whenever their opponent makes mistakes like these and judges should be doing their part in giving out warnings/upgrading them to losses after 3. Joe should have been given a game loss just based on what was on camera round 7. And if he was playing half as sloppy in the rest of the rounds, he should have been eventually given multiple game losses throughout the day so that he would never be in contention for top 8. It's kind of annoying that the penalties reset for the 2nd day given that day 2 was just top 8. Reseting penalties makes a bit more sense in a longer day 2 like a GP, but I think for just a day 2 top 8 it just allows for more sloppy play in top 8.
Vnayin is making the correct point. It's very difficult to prove intent. The rules are there for a reason. It doesn't matter if a play intended to play 2 lands a turn (ect...), doing so is a violation and should be treated so. We want Vintage to be above the bar, for people to play with honor and enjoy the game. I want this, but it allows us to be more forgiving. It also allows malicious people to take advantage of our community. When we are playing in a competitive REL event, we need to be consistent with the application of the rules. Not doing so opens the floodgates.