In reply to Peter Metcalfe:
i've shared a bothy with a group of young'uns with loads of booze and the car parked by on about half a dozen occasions, some in Wales, some in Southern Scotland.
only on one of those times were my prejudices proved unfounded. the rest of the times it was a grim, grim experience, with one night so bad that i left the bothy at about midnight and crashed in a bivvy about a km away.
sadly, the reason they have a bad reputation is because people have bad experiences with them.