Kong unprivileged user destroys pidfile

gistfile1.txt

paul@srv-test-1a:~$ kong version
Kong version: 0.4.1

paul@srv-test-1a:~$ sudo kong start
[INFO] Using configuration: /etc/kong/kong.yml
[INFO] Kong version.......0.4.1
       Proxy HTTP port....8000
       Proxy HTTPS port...8443
       Admin API port.....8001
       dnsmasq port.......8053
       Database...........cassandra keepalive=60000 hosts=mq-test-1a.XXXX.internal,mq-test-1c.XXXX.internal port=9042 timeout=1000 keyspace=kong
[INFO] Connecting to the database...
[INFO] dnsmasq started (dnsmasq)
[OK] Started

paul@srv-test-1a:~$ sudo kong stop
[INFO] Using configuration: /etc/kong/kong.yml
[INFO] dnsmasq stopped
[OK] Stopped

paul@srv-test-1a:~$ sudo kong start
[INFO] Using configuration: /etc/kong/kong.yml
[INFO] Kong version.......0.4.1
       Proxy HTTP port....8000
       Proxy HTTPS port...8443
       Admin API port.....8001
       dnsmasq port.......8053
       Database...........cassandra keepalive=60000 hosts=mq-test-1a.XXXX.internal,mq-test-1c.XXXX.internal port=9042 timeout=1000 keyspace=kong
[INFO] Connecting to the database...
[INFO] dnsmasq started (dnsmasq)
[OK] Started

paul@srv-test-1a:~$ kong stop
[INFO] Using configuration: /etc/kong/kong.yml
sh: 1: kill: Operation not permitted

[WARN] It seems like Kong crashed the last time it was started!
[INFO] Removing pid at: /usr/local/kong/kong.pid
[ERR] Not running. Could not find pid: 1972

paul@srv-test-1a:~$ sudo kong stop
[INFO] Using configuration: /etc/kong/kong.yml
[ERR] Not running. Could not find pid at: /usr/local/kong/kong.pid

paul@srv-test-1a:~$ ls /usr/local/kong/kong.pid
ls: cannot access /usr/local/kong/kong.pid: No such file or directory

paul@srv-test-1a:~$ ps aux | grep [k]ong
root      1955  0.0  0.0  29744   864 ?        S    04:24   0:00 dnsmasq -p 8053 --pid-file=/usr/local/kong/dnsmasq.pid -N -o
root      1972  0.0  0.1 182620  1928 ?        Ss   04:24   0:00 nginx: master process /usr/local/openresty/nginx/sbin/nginx -p /usr/local/kong/ -c nginx.conf -g pid kong.pid;

paul@srv-test-1a:~$ ll -d /usr/local/kong
drwxrwxrwx 8 root root 4096 Aug 10 04:24 /usr/local/kong/