In order to get the information such as the name of the torrent and its files from the hash you do need to connect to someone in the swarm to download that metadata. You won't know what it is until after you've already connected.
Connecting to an unknown machine and asking what they have, is like knocking on a stranger's door and asking what they're selling. Them mentioning something nefarious and you leaving in response, is very obviously not a crime.
There probably are nefarious content you can see just from the filenames but not everything is like that. Moreover, you "only" know they distribute it, you don't do it yourself.
