Would they? Or would they assume that a VNC server was left open either through malice or incompetence, and it's presence therefore not an invitation to be acce

Would they? Or would they assume that a VNC server was left open either through malice or incompetence, and it's presence therefore not an invitation to be accessed? This is the difference between a storefront being left unlocked, versus a private home being left unlocked. An unlocked storefront is likely to be open for business, so entering is reasonable. An unlocked house is a security mistake, and entering is trespassing.