There are good reasons to change culture. We're trying to figure out what needs to change in our culture now after the Littleton tragedy. We're still struggling over the educational system, over the separation of church and state, and over issues of personal freedom, because we recognize the ideal and the benefits thereof. There are also good reasons to remember the culture of the past. It's an event mostly centered around the culture of Scotland and Ireland.
Kilts are worn, haggis is available, and bagpipes and drums play.
The stone is tossed, the caber is hurled, and in general, a good time is had by all. However, some things are better left in the past. For example, you won't find attendees trying to assassinate members of historically rival clans. Nor will you find horses being sacrificed, or cats set afire, or what have you. They may have been part of the culture at that time, but there's no need to bring that back, no matter how crucial it was to your particular clan.