Forgivce my ignorance but have no idea what the 528 rule is or any other number rule, i geocahce for the fun of it, nothing more, nothing less, i enjoy the frill of finding whats in the little box or the gratification of finding that illusive micro/nano. If i were to attend an event like what you did and they started saying what your said i probably feel the same way, it's all about fun of getting out there, getting together with fellow cachers and enjoying yourself, NOT discussing what YOU CAN'T do. I've heard that as a rule you can not look for a cahce for more than 10mins once you reach GZ, whether this be true or not... I personally don't give a rats , ill keep searching until iv'e had enough, i abide by the rules set out in local area and do not falsafy logs which some do. That type of event which you went to sound WAY TOO SERIOUS for an everyday cacher but i guess like any other sport/activitary some people take it too seriously. But like what was mentioned in previous posts everyone has their own opinion. Enjoy the fun and don't let one person sway you from that.