In some countries they don't. In Portugal for example they are not allowed and you can get fined for having one. You also cannot have a camera filming the street without specific authorization from a public entity for data protection, and you most likely will get denied unless you are a business and are filming only inside your premises, if you point your camera to the street you likely are getting denied. Ring cameras would be illegal there too.

Image rights and rights for privacy are up there just below right to life, so for example in a court case, video evidence is only accepted if it's a murder or attempted murder case. If you film me stealing your stuff it's not admissible.

Main reason being that the constitution considers your right to go about your business in any place with whoever you want to not be disclosed without your consent.