[Freeswitch-users] is loopback really 'evil'?

Hi there, Could someone please elaborate on this (from http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_bridge#loopback): "WARNING! Loopback is evil and should only be used as a last resort, when no other approach is possible." Need one only take the precautions noted in http://wiki.freeswitch.org/wiki/Loopback#Precautions in mind, or is there more to loopback than meets the eye? Thanks, Adam