It does seem unusual. But, I have had people become Christian and begin to feel the need to convert (or try to) everyone around them. They feel called to do so. I appreciate the sentiment, but still believe you should only give a Bible to someone you KNOW is going to appreciate it, not someone you are trying to convert. If you feel compelled to try to convert me, I'd rather you say something like "You know, I've found a lot of helpful information in the Bible....would you like me to get you one?" I can politely decline if I like, or accept. That way, you can spread your message without wasting your money on a gift I may not appreciate.