1. Anyone who is injured, however slightly, by sideclips has no idea how to load or unload a shotgun. It's simply a non-issue.
2. I shot, this very afternoon, a Francotte with sideclips. It is loose in the lateral plane! This gun has two underbolts, and a Greener. If the intention of the sideclips was to prevent lateral play, it failed miserably in this case.
3. Pigeons used in shooting events are the property of the shooters to do with as they please. If you have a problem with private property rights, move to Cuba.