Vibhore,
One Of the major ramification is that someone with access to SCAT in production could upload false or bad data into your system. Especially when it comes to configuration without the other areas locked as well ,someone could really mess with your tables load user and the list goes on and on and on.
Another valid ramification is that even if someone is allowed to use SCAT and wants to upload something ,they could potentially upload during peak usage of the system and cause a major slowdown. we usually only allow it to be open during off hours and when no one is in the system