I realise it may look like whinging but we've all accepted we lost to the better side here, so why not move on from that, and have a very valid discussion about why this kind of behaviour is tolerated, and why people are being shouted down for suggesting that it shouldn't be?
There does seem to be a Peruvian fan back lash against the firecracker culprits. Potentially also by the people that lived near the zone. So maybe changes are slowly occurring. There appears two be two separate camps that debate how visitors should be treated (old school vs new wave school)
A lot of comments (not here but elsewhere) seem to make it like 95% of Peruvian fans were outside the hotel at 3 am lightning up the skies. From what I gather it was a small amount of fans being dicks. Similarly the stadium was not light up in lasers. Again a small amount in dicks.
Roughly 99% of people that turned up at the stadium supporting Peru did not have green lasers, did no boo the NZ national anthem (as far as I can tell) and simply spent 90 minutes turning the stadium into a pressure cooker.