It was rumored the Columbine killers had re-created their highschool campus layout in Doom. It was only a rumor[0], but enough people believed it, or at least it indulged their confirmation bias, that game levels are now taken seriously as threats. No doubt the swift response to your counterstrike map was influenced by that legacy.
[0] https://www.snopes.com/fact-check/the-harris-levels/
