That's the most ridiculous thing I ever heard.
When my Grandfather called his congressman and pitched a bitch about sonic booms, it was because military aircraft had cracked the wall in his house. He couldn't have cared less about the Concord. An F-104, probably out of Big Spring, had passed right over our place, and not only was the house damaged, but half our cows freaked out and jumped the fence.
When I was a kid, sonic booms knocked the windows out of my old school building on a regular basis.
You guys can cry all you want, but the real reason that supersonic flight over the continental US was banned, was because the tax payers demanded it. They were tired of their property being damaged, not to mention being shaken out of bed at 0300. The ban may have had the effect of rendering Concord even more non profitable than it already was, but trust me, nobody was thinking about that anyway. The ban helped to put Boeing out of the supersonic transport business as well, and they weren't happy about that as it cost them a ton of money.
I suggest that instead of sniping at the (Super) Sonic Cruiser, a more profitable tactic might be to participate in the project, or British Aerospace might go the way of Norton and BSA.