''Eisregen'' is German for ''freezing rain''.
The albums "Farbenfinsternis" (since February 2004) and "Wundwasser" (February 2007) are banned in Germany (Index "Liste A"), this means they may not be sold to minors or performed live.
The albums "Krebskolonie" (August 2003) and "Fleischfestival" (May 2011) are banned in Germany (Index "Liste B"), this means it may not be sold (even to adults) or performed live.