They certainly learnt a big lesson that day and I don't think it's ridiculous to say that the current Liverpool as a club (players, fans, manager) moulded in Klopp's image wouldn't exist now had they not listened. The fan base was so split back then. Now it's never been more together. It's all down to Klopp but his job would have been made much harder had the fans been at odds with the owners.
They've not made many mistakes since but the trademarking controversy shows the importance of a couple of groups like SOS and the Spion Kop lads. Keeping them honest like you say