No: 128 bit address space isn't designed to be hard to scan (see multicast for example.) One of IPv6's design goals was/is to avoid running out of address spac

No: 128 bit address space isn't designed to be hard to scan (see multicast for example.) One of IPv6's design goals was/is to avoid running out of address space - that means a large space. If you naively scan individual addresses then you will not get very far. Please read up on IPv6 before posting - it's been available for 19 years or so now. I'll grant you that a lot of the write ups on it are absolute bollocks but you should be able to find a reasonably good treatise somewhere. Look for names that you trust.