Well, I'd want to take it into a classroom because I don't want to leave it like outside. Has anyone had an experience with that, getting yelled at by a prof or something?
So far this semester none of my profs have showed any negative reaction to me bringing my downtube in (folded, with no bag) and setting along the side of the room. A couple have asked me about it, showing interest.
I've had no trouble bringing it on the bus as long as it's in its bag. I don't think there will be a problem with this in the future as long as I'm careful not to nail anyone in the head with it walking down to the back.