This comment is to my friend EG who made a comment on this post.
EG, obviously you're still my best friend. If your observance is where you want it to be (which I believe it likely is), then you shouldn't be sensitive or offended when someone makes a comment to remember that it is Shabbos where you are (noting that it was likely not allowed re: halacha to return your e-mail because it was Shabbos where you were, just as it is not allowed to make a phone call to a location where it is still Shabbos -- I was reminding you to mind your surroundings.) Think about it for a moment, and you'll notice that I put myself and my spiritual well-being at risk (something I will have to answer to on the day that I die and am judged by Hashem) and I consciously broke halacha by e-mailing you back to tell you that. I'd say that's an act of friendship.