The MTFs have families too ;_;
(or are you? o-0 )
The best thing you can do with Guards at the moment is use the console and spawn them in a line to block SCP-049 etc. so you may as well make them unable to spawn via console (Like SCP-860-2, SCP-682 etc). I think they should actually have another purpose in game, such as occasionally patrol endrooms and the SCP containment chambers, and be able to be harmed by hostile SCPs.