My garden doesn't have a fence, doesn't mean you can host your picnic here.
But you can totally sue anyone for anything, and that makes for entertaining headlines - even though if plaintiff lost promptly
It is possible this principle applies to other countries and other things than pools.
However my favourite example is the law that allows any bee keeper to enter any private property if they are pursuing fleeing bee swarm.
I wasn't sure if it is the same or similar principle in Russia or a different one that requires active care for a burglar. Unlabeled chemicals causing liability for a burglar seems extreme to me