My doormat says "GO AWAY", the old school robots.txt.
Your analogy doesn't hold. There are few spiders trying every door and window of every house. The risk profile (attack surface area) is much smaller in the physical world.
If a service publishes a port, many someone's will probe it, legitimately or not.
Where your analogy does hold is courtesy. If one of my neighbors sees my door open, does a walk thru to check things out (I might be bleeding out in the basement), finds nothing, then I absolutely do want her/him to clue me in.
Your analogy doesn't hold. There are few spiders trying every door and window of every house. The risk profile (attack surface area) is much smaller in the physical world.
If a service publishes a port, many someone's will probe it, legitimately or not.
Where your analogy does hold is courtesy. If one of my neighbors sees my door open, does a walk thru to check things out (I might be bleeding out in the basement), finds nothing, then I absolutely do want her/him to clue me in.
Ditto my website(s).