Put trap doors inside your front doors,and make a lava pit.When you are afk,open the trap doors,so when some1 comes in,BOOM,falls and looses all their stuff.You can do it with fire,to,put netherrack in the ditch and BURN!!!,but i would say lava is better...so just think of ways to protect your house,Just find something that suits u.I do have a youtube account:SSkillstreak