Codeworks,
What on Earth are you talking about?
Clearly, to invade your 83 year old neighbor's house you need to do it the legal way. First, sanction you neighbor by cutting his electrity & water supplies off. Next you whould schedule several inspections. When these inspections reveal that your neighbor has no weapons, then you should call all the inspectors useless & acuse your sactioned neighbor of playing games.
After, you've called your neighbor a liar without any evidence you should then get the other neighbors together for a vote to "show their cards" on whether they should be invaded & attacked. The night before the vote you should wire tap all the other neighbors, bribe the poor ones & then call the vote off because the local minister threatened to veto your attack. You will now need to act quickly because your neighbors will start to think you are a war raging lunatic. Here's what you should do - forge some receipts indicating that your neighbor bought a BB gun & present this at your emergency family meeting as "evidence". Your familiy will think you're a hero, while the neighborhood mocks & despises you, but don't let that crush your spirits because you are a soveign home owner.
After you've convinced your family that your 83 year old neighbor and his "non-existing" BB gun are a threat to you, you should send your son and his friends over to burn down the neighbor's house & liberate his 81 year-old wife (if she doesn't die in the fire).
This is the only "just" way to handle this situation.