Battle.net communities and makers thrived for 15 years with zero moderation and a laissez-faire approach to peer to peer hosting. Entire game genres were invented (MOBA, TD). Imagine if Blizzard had cracked down in its infancy because of a few mostly satirical Nazi maps?

Good intentions among corporatized and safety oriented developers will certainly prevent another such golden age and maybe already has - considering the recent state of gaming.