The band received scrutiny from the German authorities due to their morbid lyrics, causing three of their albums to be banned in Germany by the Federal Department for Media Harmful to Young Persons.

Unlike regular banning (referred to as "indexing"), which prohibits playing the songs in public, selling to minors and any kind of advertisement, Krebskolonie is not allowed to be sold at all in Germany.

The reason given by the Federal Department for Media Harmful to Young Persons were the lyrics, which were described as cruel, inhuman, misogynistic and violent.

[5] Although Eisregen were criticized for their morbid horror and splatter-influenced lyrics, their songs also have some humorous undertones and sometimes even deal with social or historical topics (e.g. "Schwarze Rose", "vom Muttermord", "Ripper von Rostow", "Eisenkreuzkrieger", "17 Kerzen am Dom") in a fictional way.

Ronny Fimmel founded a gothic metal band called Ewigheim in 1999 (Michael Roth and Theresa Trenks were featured as session musicians).