yes, I do, but I didn't always, it's no big deal to take it out and put it in a bin. I've done it many, many times.
My regulator seems to set off more security people than anything. I went through Miami, before 911 mind you, EVERY security stop, they pulled out my rig, and looked it over like a bunch of monkeys trying to figure out what the monolith was in 2001 Space Odyssey. For some reason, we had to go through 2 "check points" to get to one gate on one of our flights and both times they pulled it out and looked at it like they had never seen a regulator before ... how many regs do you thing go through Miami international every day?! Hundreds.