to within an inch of his life? who owns the house? check with landlord re damages and whos got to pay (IT MAY BE ALL OF YOU LIVING THERE)
By law it might be that they all have to pay but I'd be getting my share of it from the pillock who kicked it in.
Or better yet, a steel door with wooden fascia. Anyone trying to kick in a good steel door is more likely to break their foot than the door.