@Bernard@friends.ravergram.club big ol' sign at front door: "TRESPASSERS WILL BE SHOT" plus the same text in a niche fictional/constructed language of your choice. in toki pona, per some llm, "jan li kama lon ma mi la, mi moli e ona" solves this problem two ways: immediate threat of lethal violence, and strong evidence that you do not speak the english language and thus communication is nigh impossible.