I never understood the point of Strafgesetzbuch section 86a. It does not make any sense to outlaw using Nazi symbols. It's like outlawing symptoms instead of caring for the illness. People will just take it underground and you will have a harder time tracking it down.
Being underground makes it hard for those wishing to spread it to spread it.
On the other hand the law has been used to a ridiculuous extent in banning Nazi symbols from all sorts of cultural artifacts such as games or movies. Doesn't make any sense to me.