You're right that you should try to make yourself a less appealing target for thrives, but some of your methods don't really hold up to scrutiny. Beeping motion sensor lights and secure locks and doors are great ideas. They will absolutely deter casual thrives and addicts.

Advertising that you have guns is just advertising that you have something to steal that is valuable, easy to sell, and easy to carry.

Warning signs for dogs aren't much better. If you don't have a dog, that will usually become obvious to anyone close enough to read the sign. If you do have a dog, then the sign is just an invitation to have them murdered the next time you have to interact with police at home. It will also expose you to liability should any trespasser be injured by that dog. Yeah, even the person robbing you, but also children, other pets, and well meaning innocent people just doing their jobs (and not breaking the law by entering your property without permission) like meter readers, mailmen, land surveyors, emergency response, etc. When I see a dog warning sign, to me it just says that a dumb asshole abusing a dog lives here.

Broken furniture sounds clever, but that just says trashy, not poor. Actual poor people take better care of their shit. HOAs would also limit the places you could actually do this without fines in the suburbs. Broken outdoor furniture is as common as weeds in more rural areas.

WiFi Cams just mean that you can afford Internet. EVERYBODY has WiFi cameras. They are ridiculously cheap to buy and easy to install. Cameras (WiFi or not) aren't a great deterent anyway.

DO NOT put gun signs/stickers up. It's an ongoing joke that a Glock sticker on a truck means "free gun inside".

That's an interesting take, and I think I might agree with you.
Solid-looking boring lock, everything looking like it would last decades, looks like someone who sorted the security confidently.
Plastic looking wifi cameras everywhere have a "curtain twitchy granny" vibe.