You would say, "I hope so," because gun violence was so low. And gun banning in towns was fairly rare, it was a trend started in later days by Wyatt Earp. BTW, he was fined in the 20's in San Francisco for carrying a gun, the freaking hypocrite.
Okay, I get it now. You mean "I hope so" as in "like the old west" when gun crime was actually lower than today. Mind works a little slow early in the morning.