Some friends, when I tell them of my childhood, they assume I'm still a JW. It's like, "NO, I USED to be." But sometimes, people don't get that it's a huge huge difference between "used to be" and "currently practicing".
A friend of mine gave me several gifts for Christmas, and I was embarrassed I didnt' have one for her, so I told her, sorry, "I'm not so good with this stuff, it's only my 4th Christmas, I USED to be a JW..." She was then like, oh, I'm sorry, well, it's not really Christmas, just a "winter gift", see, no santa clause on the wrapping paper, etc.
I was so frustrated. "no, no, I'm not currently a JW!!!" It's sometimes better not just not bring it up.