Radar jamming only seems to change the engagement range of the enemy AI. They still somehow manage to lock on to you and fire their missiles so they probably don't care about a ship being radarjammed at all.
How to reproduce:
# spawn mobs with lock on missiles
# sit in a ship that is using a radar jammer (and you're in god mode so you won't die)
# you'll get shot by lock on missiles (that are locked on to you)