Hello Zameer,
As Isaias Freitas pointed out modifying the delivered stopsap script is not the way to go.
I think the solution provided by Juan probably falls under "Remote Consulting" 
In order to get awareness you could:
1. insert the "banner" command in the .profile of <sid>adm.
eg: banner Warning ... This is Production ...
2. You could change the shell prompt of the PRD user so that it has a visually different background/foreground colour.
3. You could create a wrapper script that calls stopsap. In that wrapper script you could code your Y/N .... easy enough to do. We use wrapper scripts into which we put variety of checking and logic and that wrapper script calls the standard stopsap.
Just trying to provide a different way of trying to address your problem.
KR,
Amerjit