i've thought this through to many times. it's quite simple really.
you don't read about people being arrested for just having it. they're being raided for selling it. neighbors call in that you have people going in and out all the time. then a cop sits outside in an unmarked car and you typical kids (that 25-year old) don't think anything of it. they record 12 people going in and out within a 24 hour period, and get a search warrant. you never knew they were there.
and that's the CIVIL scenario where you're lucky its just the cops. anyone else will just wait for you to leave and rob you blind. and if you left anyone in the house when you left, they're fucking dead.
i dont mean to be a killjoy on growing weed, i myself am in medical need. but for fucks sake, this isn't a game.
end rant.