I guess if I was taking a bus I'd probably want my own space because there's plaenty of it and might not care to talk to a complete stranger weather for the next twenty minutes or have them try to pick me up on a fucking bus. (that is probably what's going on Unfo ) Throw a massavie amount of crap on the seat next to yours, ( bring a backpack just for this reson alone ) scowl at each and every person who walks by, smell like cheese soup, and try to look genrally unclean, and mildly insane.
Good Luck.