Don't worry about it - there is nothing unusual about any of that except you noticed it... somebody looking for an address and found it near your home. No sinister explanation makes much sense. If it was a criminal he would be a lot less obvious than that. Would you be as concerned if a silver VW bug drove around looking for an address and found it near your house? The whole "black van" thing is strictly for B grade movies. The notorious serial killers, Roy Norris and Lawrence Bittaker, used a silver van for their murders when they needed a van - a black one was too conspicuous.
Call your mom, tell her to come home.. and if they approach the door and you dont know who they are or they look dodgy i would call the cops tell them whats happening and if they show up and it was all a miss understanding they will understand :) better to be safe then sorry :)
black van is the security services
white van is a sexual predator
so
providing you haven't been downloading pirated films, you'll be fine
Tell them to get away from your property. If they do not listen call the cops.
call the cops and then dont complain when someone gets shot
That's what we pay cops to look into - & they will....
i would call the police or another adult that you trust