Of course it's OK! Unless they display notices that state otherwise. In fact a little challenge could be, see how far you can go with trying on as many items as you can before they suss you out, when they might kick you out the store and ban you....LOL.
Tom Ford is probably widely known, yeh another 007 suit sponsor. Do gents periodicals like GQ have a wide readership in the US?Well Savile Row is a street, and I'm sure there's many Americans know what it's famous for, and is famous all over the world.
The many who've seen 007 movies in the recent years may have an idea who they are, especially if they read something like GQ or Esquire as well.FWIW I'm sure almost everyone I know, knows what Zegna is that's for sure. LOL
That's quite reasonable, considering Samsung quoted me equivalent of $250 for replacing a busted Galaxy S screen once, and it had to be sent away for a month. So I didn't bother, and bought another phone.