sorry to hear about this. it's a shame some don't want to work for what they want, and others have to deal with the bs of having their things taken.
hopefully they get caught. i'm not sure how hard it is to balance our cars on one cinder block per side, i've never done it, but it looks like those guys have before...
RE: over tightening your lugs - don't. you can warp your rotors by over-torqueing.
ps - are you the guy that took his 6 to VAC? sadly, i took my car to them for work. 6 months later, big mistake...
07 e90 335i
13 mk6 GTI
13 f30 335i