Interpretation = licence to lawyers to print money.
The German legal system is clear and logical; as a result most legal cases settle quickly and the fees are not high. I believe the cost of defending a libel case in Germany is around £7000, in the UK £100k just gets you to square 2 on the legal Monopoly board.
Unless words like "indecent" can be clearly defined, they should not be used. Who is the "reasonable person" who makes the assessment?