I think "bash interactive shell" is what you want to search for.
Have a look at item 6.3.2 at http://durak.org/sean/pubs/software/bash/bashref_25.html (picked up arbitrarily from the search results).
I *think* scp uses the shell non-interactively, but test to make sure. Either way, you should have that in bashrc in case there are other non-interactive shells in use (and there usually are).
Devin