Where I come from, if one is playing in any round where other bag tags besides your own are present, a bag tag challenge IS ON. Plus, I believe that if there is a bag tag challenge declared (usually at least 6 weeks in advance), then it is MANDATORY to be there to represent. If one cannot be present for this declared challenge, ample reason must be shown to the One In Charge or else that person moves to back of the line, and numbers are recalculated. That way, the numbers are always current. Also, this means that people cannot choose when they want to risk their tag, depending on who shows up.
It is sometimes difficult to make this system work, as acquiring the tags from those who never show will be hard to do. However, if the One In Charge keeps an accurate list of phone numbers and other personal information, it can work. For those who think that some will not want to share personal info such as phone numbers, email addresses and possibly even addresses, if there is a large enough community (which Atlanta obviously has) then it will work because whoever doesnt want to share personal info for accountability simply doesnt join.
It might seem complicated, but to me and others who have seen the system work, its pretty simple. Be accountable, provide personal info just in case, show up when there are declared challenges, and risk your tag even in casual play. It makes all better players, by giving those who are not as skilled and want to get better something to look forward to, and by making those who are more skilled respect those under them a little more.
For those that say that if they want to go out to the park to practice shots and mess around without having to worry about losing their tag, unfortunately they just have to pick times to go out when others with tags are less likely to be there. As time goes, a system of honesty and accountability develops. For instance, if people who have tags meet at odd times in the week and it is obvious they were only out to practice, agreements can be reached on a situation-by situation basis. Remember, for the system to work, common sense is required, every situation is not always 'black and white' and there will always be 'gray areas' to be sorted out.
I have been a part of two systems that did work, and there are some really fun and interesting situations that develop over time. Overall, a properly functioning bag-tag challenge system makes players better and gives people additional excitement when there is something more on the line besides gambling with money.
Im sure many will object with certain points, but I say we all have a healthy discussion to make the Bag Tag Challenge a little more fun for everyone involved. Who knows, maybe with such a large metro area the Bag Tag Challenge will actually GROW!