I've been saying it since the LFD system came out for cross server, that killed the community of servers IMO. The dungeon finder added in BC worked fine. You knew people on your server, made friends and bonds with people. Now it's just, click button, sit in que for 40 minutes then run dungeon with 4 random people I will never see again since they aren't on my server.
Spamming LFG chat for a group might of seemed like a crap method back in the day. But I know I never spent 40 minutes looking for a H SP group in BC. The only thing I think the LFD helps now is those who are leveling up for the first time, it gives them a chance to actually find a group for low instances.