Chairs and furniture should be large, over-stuffed and/or fastened down so they can’t be picked up and used as a weapon.  Seems simple but family lawyers know how stressed out people can be.  Personally, I like very low (extra low actually) overstuffed chairs for people to sit in.  It’s hard to jump quickly out of low, overstuffed chairs and they’re heavy so they are hard to pick up.  Magazine racks etc. should be bolted down or to the walls.  Ditto wall decorations and tables etc.