Masking and then disabling dbus.service causes the system to freeze

[Removed by request]

I'm using Ubuntu 16.10 dev with systemd-sysv 231-6 and if I'm executing the command "systemctl mask dbus.service" and then "systemctl stop dbus.service" the system does freeze after a few seconds (even switching to the console is not possible anymore). But booting then the system works fine without any freezes while dbus got successfully disabled.

[Martin Pitt (pitti)]

Right, you can't sensibly stop dbus on a running desktop. This will kill all sessions, kill lightdm, etc. and toss you back to consoles (Ctrl+Alt+FN actually still works).

[Removed by request (removed3425744)]

No, switching to the console for example with CTRL + ALT + F1 doesn't work anymore (and the freeze causes also that constantly the last frame before the freeze is shown).

[Removed by request (removed3425744)]

@Martin: I would be fine if this action would throw me to the console and still accept input. But that the system does fully freeze without accepting any input similar to a kernel panic and that from an userspace process looks definitely not correct. What should be done now?