IF one is aware of a possible interdiction and can actually target the ship prior to it which means most generally they are behind you somewhere. Slowing down and dropping out of hyper, eliminates any and all ships in the previous instance when the new one starts. Thus if I'm not interdicted withing 25 seconds of reaching my destination vector where as I would normal drop out at I deliberately drop out, which starts a new clean instance, retarget the destination vector an engage hyper again.
The process doesn't get rid of them entirely, but does stop them from interdicting you in regards to that one destination. Like someone else stated, if they are included in the comm section as part of the mission. They will try again until that particular mission is done. Thus if it's the last misson of more than one, I would have to employ my tatic more than once.