What rule or tradition do you think people should stop following?
People should stop doing the bouquet and garter toss at wedding receptions. As far as I can tell, the majority of single people would prefer not to emphasize their singleness by standing in front of all the guests and trying to catch something thrown at them.
Note: If I was in your wedding party, I cheerfully joined in the bouquet toss because it was important to you on your special day. If I was not in your wedding party, I probably hid during that particular photo moment unless someone noticed and dragged me along with them.