I don't think anybody should do that, irrespective of race, religion or location. It's dangerous, and could end up getting you killed by someone who's carrying a real weapon.
And this is precisely my point, especially in the US where so many people carry guns, presumably to be able to stop people who look like they might be a threat.
But to imply that it wouldn't be even worse for someone who looks like they might be Middle-Eastern would be pretty disingenuous. I hope that's not what you mean.
Would you do it if you looked like me? I'm of Indian origin, and there's no fucking way I'd do that, not in the US.