How do I disable beeps in all parts of FreeBSD?
 

So far I've done

hw.syscons.bell=0 in /etc/sysctl.conf
xset b 0 in .xinitrc

It still doesn't work with slock (screensaver) or in the console mode.

So what does sysctl hw.syscons.bell print?

It prints 0 as expected.

man wsconsctl