[maxerickson]

I certainly wouldn't expect you to say "Merry Christmas" to your coworkers.

My question is more whether you care if someone you don't know says it to you on the street or when you buy a coffee or whatever.

[mcguire]

It wouldn't bother me at all. Where I live, I get "Merry Christmas"-ed all the time.

On the other hand, different people are rubbed the wrong way by many different things. I do try to avoid going out of my way to avoid offending people, by, say, assuming they're Christians. And on the other, other hand, I'm fine with offending people who want to go out of their way to be offended.