Most people don't like snakes, or are even afraid of them. Hard to understand for us reptile-lovers, but it's definitely something to be aware of before heading outside with a snake in tow. Some people will come around with a bit of education, but most who are afraid won't. And it's difficult to change people's minds. You want to be careful with stuff like that in case some yahoo decides to rid you of your snake "problem". I don't see a problem with bringing one with you, as long as it's a short trip, so the snake doesn't get too cold or stressed out. But there are people who won't like you and your snake, so you have to keep it in mind.