If you know what you are doing and what can the worst result be if u r caught, then feel free do work outside. So far as I know, if u don't do something other illegal works, ur file will never be looked upon even if u r receiving pay checks on SSN. That's what I know, but consult with others as well. Depends also on where u are.

Tai pani use nagareko ramro ho. But I know many who are using it for work outside and have not been in any trouble for a long time.