Hello!

You don't pestering the moderator. Above all I'm a member in the forum and almost all of my postings are postings as a member and not as a moderator. My activity as moderator is a secret job - ban spammer forever, write a warning pm to suspicious new users. Rarely in the past I had to intervene within a thread as moderator.

Should I not worry about using cups, rsync, ssh and/or dhclient if
these should 'serve' some purpose I don't presently need?
If you use for example ssh, your computer is the server who offers the ssh-service. You as the client of the ssh-service may write a malicious bash-script and may attack your own server. Now, if you are sucessful, your own server may no longer be secure. But why should you do this?