irssi autolog options

My favorite IRC client is irssi. I keep a log of my conversations using autolog; however, I dislike logs from chanserv, nickserv, and other random bots which I'll never reference. I discovered that autolog has a setting to ignore them:

/set autolog_ignore_targets chanserv nickserv 

While searching I also found log_create_mode; irssi's default file mode is 0644. I prefer to keep my conversations private unless I specifically broaden permissions:

/set log_create_mode 0600

 Now new messages and channels are private until I chmod them.