I love this idea!

Read the rules xD I'm at the german site too and this is whats written in the rules.

I don't think that that was told. Because it's like Drew said and as it is written in the rules. It is allowed to write about death and torture as long as "real" characters don't die and it's not too detailled. Otherwise the rule that you can use Avada Kedavra on NPCs wouldn't make sense. And if you want to go into details you can change to an owl or other private places to write about it.