Not so impressed by 4chan being heroes until I can see exactly what this guy's threats were and how they were written.
Also since the guy is in college and child porn goes up to 18, he may have had pics of people he knows, who are only a year younger due to sex-ting, so I am not 100% convinced by that either. Most people when told 'we found child porn' say 'kill him'. I first ask what kind of child porn before saying 'kill him'.
Would have been more convinced if they had found some unlicenced firearms, etc
Just call me mister cynical.
Edit: read through linked articles and threats and it seems like a fair cop. So good on 4chan. Even providing his IP address without needing a warrent etc.