What is your time's value?
One thing I have learnt in this new social engineered econonomy is that you become a familiar face in certain establishments. the results ; You gain new acquaintances, business acquaintances, and UNFORTUNATELY, SOME WHO CANNOT recognize that when You have your head down with InkPen in one hand, and one hand on your laptop Keyboard, and your ears embraced by your favourite sound generator, that you are BUSY!
How do you deal with this?
Find a location; safe and unfamiliar to you. Make no friend there, tell no one where you go to study, answer emails.
Make your hours count for something.