Advantage / Disadvantage Contact

Q: When double teaming a player, should it be called if the defense makes contact with the offence's hands or back but the contact does not affect the offense's movement or balance?

A: This play is best answered when looking at the advantage/disadvantage principle.

33.11. Contacting an opponent with the hand(s) and/or arm(s)
The touching of an opponent with a hand(s) is, in itself, not necessarily a foul. The officials shall decide whether the player who caused the contact has gained an advantage. If contact caused by a player in any way restricts the freedom of movement of an opponent, such contact is a foul.