Annoying Prank calllers, what to do?

Here is the situation, I came to stay with my grandma for a few weeks because my grandpa went out of town and shes never been by herself. I quickly realized there is somebody that constantly prank calls her house. She never realized it because they have different "personas" per se but its all the same person(young teenage girls)Theyve been calling with some straight fucked up shit like asking my grandma if she wants to take a survey for "teenie tiny tampons" wtf? Anyways I was able to get their number, even found out their name and address. Gave them a pretty good scare and the calls stopped for a few days but have slowly started back up. Should I just call the phone company and have the number blocked or should I get nasty on these bitches.

 

shit in their pillow cases

 

If you have their address start signing them up for porn and other sorts of subscriptions they wouldn't want their parents seeing.

Then sneak into their house and shit directly on their faces, bypassing pillowcase altogether.

 

put their number up all over the internet in forums, such as this one. plenty of people will call and annoy the shit out of them

or just do what skamikaze said

 

yea, lemme get those digits. How old we talkin about here anyway? I wanna really scar them.

 

go stalker on their ass.. call them with creepy phone calls.. send them post cards with little creepy messages on them

 

^^^LOL at the post cards.

 

hahaha

 

haha i like the postcard Idea, im going out of town this weekend to, so I might it send it from there. I just don't feel like getting arrested over some stupid shit so I wonder what constitutes going too far? Maybe shitting on there faces is alittle to far, I will probably just go for the pillow cases.

 

listen to some lamb of god for inspiration.

make a deep metal singer type voice and threaten to do terrible things to them...

Or

Haha next time they call say the house was bought by Kurby's hardware store...

 

put their number on 4chan

 

I wanna see those digits brah!

 

post the number up here i got skype and a mic....

 

This could backfire on you if you aren't careful. If their parents call the police on you, who are they going to believe?

 

yes!

/b/ can solve any of your problems

 

yah man show us their number so we can annoy the shit out of them