It probably was called from the CUPS server. Look in rc5.d for anything like S20CUPS or something along those lines. Remove them with
Code:
update-rc.d -f cups remove
Then check /etc/modules to make sure parport isn't listed there. If not, then you're basically done, all you need to do is reboot to see the effect of not loading the parport module.

HTH,

Durand