I would suggest that we forget the "tartan banner" idea.

After all, this tartan represents X Marks the Scot and is trademarked and that trademark, and the rights thereto belong to Hank. Toting around a tartan banner and claiming that it represents a Membership is much like having an "X-Marks" tent at the Games and so on, and that was soundly nixxed by the management, some time ago.

Wear the kilt..sure. Wear the pin, sure.
Do something that suggests in any way that you "represent" X-Marks the Scot...Nope, and assembling an X-Marks rabble and marching in a Clan Parade or other place where you'd use a banner...NOT.

Of course, if you want to make a banner and hang it in your house, go right ahead, eh? I'm sure that nobody will be upset about that.

Just a heads-up.