Respecting Other People's Space

This may not sound like a big deal to you, but it should. The small ways of acknowledging another human being's personal space and respecting that person' space, i think, is something that we are lacking greatly. I've been thinking about this quite a bit before, whenever things similar to this has happened. And i guess want that reminder for myself to also be a reminder to you guys  that if you are up in some one's bace, please acknowledge that you are.