I hope, I almost know who is the 2012 Linux Guru?. any guess mathew ? :-)
and why there is no default permission to execute "/etc/rc.d/rc.bluetooth", even for root ? what reason ?
That looks like a bug.
If you feel up to it, check the Slackware bugtracker and submit a bug report if it's not already there.
PS: in *nix like permission system execute bit is not for "root" rather than for the owner, group or everybody else ;)