instead of nails just use those big drawing pins.
we were allowed them in our halls, but if your people are super-picky, just dab a bit of white paint over the holes in June.
My flatmate in 1st year had a couple of wood-mounted canvases on his wall - I used those things for my speakers an all.

we were allowed them in our halls, but if your people are super-picky, just dab a bit of white paint over the holes in June.
My flatmate in 1st year had a couple of wood-mounted canvases on his wall - I used those things for my speakers an all.