It's not that sour, just browse as anonymous. I don't know that it destroys the threads, probably going too far, but I Just don't think it makes sense to have a conversation out of chronological order. I'll sample a couple selected best nodes.
What do MOST logged in users do? How do you yourself order replies? If you prefer to read them in chronological order, and you being a discerning and rational person obviously prefer the best, then it would be a courtesy to extend that to visitors. Typically up-votes follow chronologically, so in a lot of cases it makes no difference. It's probably the most annoying for people very familiar with Perlmonks and don't log in because it's not convenient or quit logging in altogether.