Freedom of speech

I was on an escalator tonight, standing to the right as per escalator etiquette, and a young man, who I soon after realized was equip with many a bag, began to softly beat-box into my ear so as to indicate that he'd like me to move.  I obviously thought he was a crazy person and simply ignored him until I realized he was trying to get by.   

That later got me to thinking about something my prof recently said to me (in response to me jokingly sharing a word I had accidentally invented) "But Janna, you can't just make up your own language.  No one will understand you".  But can't I?  Language is something I've thought a bit more about recently, especially since I'm planning on moving to Montreal this summer.  I like to think that as long as your message gets across somehow, that being grammatically incorrect (or off-beat) shouldn't really matter.  With this in mind I have decided, what with all of the acronyms and  minified versions of words and phrases that are invented on a regular basis in conversation these days (digitally and otherwise), that having a person melodically hiss and spit at me is not that outlandish I suppose.