[nottorp]

Might also be a feature of cross realm play. Or whatever is cross server play these days, I haven't touched WoW in a long time.

If you know you're not likely to ever meet those people again, you don't bother.

[vbezhenar]

That's exactly what's happening on Anniversary servers. They crammed like 20 servers into one megaserver, so there are like 100 000 players on the same server and you're very unlikely to meet the same person twice.