Here is a matrix for what's right to know and what's wrong regarding foul counts. Of course, I am always right
Right: knowing the team foul count
Wrong: letting anyone, including your partner, know that you know the number of fouls on any individual player
Wrong: letting your knowledge of either team or individual fouls influence your calls in any way
Gray area: actually knowing the number of fouls on any individual player
Personally - I try to stay away from that gray area because someone might find out and that's a "wrong"