If you really don't want safe mode to be activated *at all*... you can disable it. That means you know that no one is getting into SafeMode in the first place.
I've not tried it but there is this for $99... http://www.disablesafemode.com/
Or you can extract mount your registry hive offline and try renaming the keys under,
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot
Kind Regards,
Ian./