snmpd will log to /var/log/net-snmpd.log file by default which might fill up your /var partition because it is not being rotated.
* enable syslog logging by default (by uncommenting the line in /etc/conf.d/snmpd)
* deliver a logrotate snippet so that the default logfile will be rotated.
I think this will eliminate one possible problem that this package introduces to a system where being installed and snmpd being started with almost default settings.
Thanks for considering.