I think there could be a market for a rando server. I've joined randoms I've met on the Valheim discord and even here on steam. I've hosted them in my worlds and joined theirs. I wouldn't give out server credentials to any world I was worried about, nor would I take anything I valued into a world of a rando. That said I've played a lot, have a lot of characters , and worlds, and I am no longer emotionally tied to any worlds or gear, so that makes things easier.

In maybe 8 -10 interactions with people i wasn't real life friends with I havn't ever had an adverse event. Meaning no one tried to deceive me, nor did I they.