In the line or on the line?

One expression different in New York than in the South (and rest of the world for that matter) deals with forming a line. 


'In' is used to indicate inclusion within space, a place, or limits
'On' is used as a function word to indicate position in contact with and supported by the top service of something


In New York, people stand 'on' line. Everywhere else in the world, these same people stand 'in' line. Based on the actual definition (it depends on what the definition of is is, thanks Bill), I will venture to say that New Yorkers have this wrong. When waiting in a line, there is not a literal line in contact with and supporting these people. That would be the ground. Rather, these people are waiting within a space, and that space forms a line. What do you think, is it 'on' or 'in' line? I may say 'you guys' rather than 'ya'll' when outside of the South but I'll take the strange looks when I say 'in' line especially since I am right and they are wrong (at least in my opinion). Speaking of standing in line, I have a few good tips to come for the NYC DMV. After two visits in one month I feel like an expert.