I would use it ALL THE TIME...

If I had a personal teleporter, and other people really didn't have one, I would be doing the following all the time...

I would sit in a meeting, and while talking in the meeting or something, teleport out, change clothes, and maybe put on a wig or something, then teleport back in. Then I would say "Space/Time Continuity problems. I'm up to speed."

I would do that all the time. Maybe it only seems funny to me.