is there a mark as a junk option under bberry mail application?

I don't believe so... I have only seen this in outlook (probably others though).

It seems like this would be a good idea... especially when linked to accounts like G-Mail and Yahoo Mail. Right now I have to keep the Yahoo and GMail applications installed just to report spams to their spam filters.

shame. that would sort out so many problems....and save up so much time.
unbelievable no one thought about implementing this function yet...