Dear michelle:
For he who sows to his flesh will of the flesh reap corruption, but he who sows to THE Spirit will of THE Spirit reap everlasting lfe...For in Christ Jesus neither circumcision or uncircumcision avails anything, but a new creation. Galatians 6:8,15.
Correct me if I'm wrong, but this scripture has nothing whatsoever to do with angels (or demons), as neither of these 'classes' of beings are subject to the benefits of Jesus' ransom. Paul is here talking about humans, not spirit beings.
In addition, my point in contrasting these two types of beings is that they are so different from one another that it's virtually impossible (either conceptually or scripturally) to determine how there could be any real interaction between them at all. A poor analogy would be like trying to mix oil and water, or plasma with chocolate brownies.
However, insofar as the Bible indicates, the only demonstrable influence angels have had on humankind is when they directly interceded in certain material ways, as with Moses, Abraham, Lot, Elisha, Daniel, Joseph and Mary, Paul, etc...providing stone tablets, physically ushering believers from danger areas, wiping out opposing armies, stopping the mouths of lions, causing a palpable blindness, etc. Hence the continuing popularity (even as it was once popular within the WTS) of "guardian angels."