Answers:
it can. it can bring in you awfully paranoid of person caught. but, if you're within a "safe" location when you smoke it, it usually relaxes you. purely mind of your surroundings.
Yes. Fear of person caught!
Not unless u used for a while and next you want more and can't find any.
Some associates can take parinoid, but most find that the tautness and anxiety is releaved after smoking pot.