Alright guys, all in all, it wasn't a good idea and I eventually realized that myself. So no further phones have been hacked since then.
I'm glad someone pointed this out :gyup:
As a bonus track, I'd like to add that they were both aware of my activities (although not of being themselves victims), and one of them even made a drawing of me, using a computer and saying "copying porn over Bluetooth and hacking Facebooks for the win". I'll post it if I can remember where it is.