No it does not irk me. In fact, I will walk up to a service member who is traveling in uniform (I spend a lot of time in airports) and I will thank them for their service.
Sometimes I buy them a beer or a meal.
They have been around the world and are coming home for a rest or for good.
The least I can do is thank them.
After I assured him that I wouldn't be yelling or dropping him for pushups, he explained that he was fresh out of basic and on his way home for a couple weeks.
Poor kid, I hadn't thought about how he'd react, or the trauma I could cause. I was probably the first senior NCO who'd treated him as a fellow soldier.