Okay, tried that:
$ sudo systemctl mask bluetooth.service
[sudo] password for qruqs:
Created symlink '/etc/systemd/system/bluetooth.service' → '/dev/null'.
That service I turned off, must not be running or anything before this works…?
I get this in the logs anyway:
dec 21 23:12:10 majtaytre kdeconnectd[4936]: Cannot find Bluez 5 adapter for device search false
dec 21 23:11:40 majtaytre kdeconnectd[4936]: Cannot find Bluez 5 adapter for device search false
dec 21 23:11:10 majtaytre kdeconnectd[4936]: Cannot find Bluez 5 adapter for device search false
dec 21 23:10:40 majtaytre kdeconnectd[4936]: Cannot find Bluez 5 adapter for device search false
dec 21 23:10:10 majtaytre kdeconnectd[4936]: Cannot find Bluez 5 adapter for device search false