captofthesswolfstar:

How did Sirius use a permanent sticking charm on the posters on his bedroom wall if he was 16 when he ran away? He couldn’t use magic outside of school…

I think about this a lot

the black were powerful enough to avoid troubles from the ministry and they didn’t want the wizarding world to know how sirius acted
my guess is that they presurred the ministry to keep it quiet ( much like the malfoys did ) and took the matter… in their own hands…