Almost all web servers log IP addresses as a part of normal operation. Usually these logs are gzipped and deleted after a given interval. This all happens as a part of normal webserver operation, even if you are not using a webapp like WordPress.
Depending on your platform you might look into setting up a cron job to delete or rotate your logs differently. 90 days seems like a long time to keep stale log files around.
Interested to see what others are doing with this…
