Bear dropped this on Twitter in reply to PerfectLegend, and I thought it worth it to mention something about how I handle it. Using this method, I have never had a problem with the following problem:

Here’s how you make this less of a problem:

Talk about this with your players before you start your bracket.

Issue clear expectations for things like bathroom and smoke breaks, because players will ask you for these things. Let them know that they need to ask for them immediately after one of their matches, and that you have to OK them by looking at the bracket and seeing what time is available for people to do so. Also let them know that when you and they agree on a time limit for these activities, and they go over the time limit, they can be DQ’d.

Know where you are in the bracket and how long matches take.

You can’t be honest with players regarding the time available to them for a break unless you know how much room you have in a bracket for those things. You’re generally only going to be able to give them break time in the first couple of rounds, because that is the only time you have a lot more matches to play than stations.

Make sure you are playing out matches by rounds as much as possible to give players time to rest between their matches. Don’t run one person way through the bracket before you have had other players get their matches in.

Write breaks down on the bracket sheet or a notebook/notepad (if using electronic bracketing, which you shouldn’t be in most cases), and make sure the player sees you do it.

When I have a player ask for a break, I talk to them briefly about what they are leaving to do and ask them how long it will take them to do it. I check the time on my watch, and then tell them exactly when I expect they will be back for their next match. I then write their player name and the agreed-upon return time on the bracket, showing them as I do this, and let them go have their break.

This becomes a two-way agreement; I let them take the break, and they agree they’ll be back by that time. If they aren’t back by that time, I generally give them two to three minutes’ grace period before issuing a DQ loss. (This also means that when budgeting the time for their break, I give them two to three minutes less than I actually have for them.)

Above all, be fair and respectful.

Before every bracket I run, I set expectations that I’m going to respect players’ time, and that in return, I expect certain courtesies from them. It’s only in partnership with your players that you’ll be able to run an efficient and well-received bracket. Respect your players’ time and communicate with them clearly, and they will respect the decisions you may have to make.