While it is pretty freaky, I think the point of Shodan scanning IPV6 devices that use the default pool is to detect linux-based IoTs that use the default NTP se

While it is pretty freaky, I think the point of Shodan scanning IPV6 devices that use the default pool is to detect linux-based IoTs that use the default NTP settings, which is kind of the reason why Shodan exists. It is unlikely that Shodan is going to hack your Raspberry Pi specifically because then people will go after them. But hackers of many hat colors will use the freely available information it gathers for their own purposes, so act with this in mind.