Presumably blocking spam leads to a wider spread of spam. Presumably having a zero tolerance policy on drugs leads to a wider spread of drugs. Presumably making firearms legal leads to more violence. Its an arms race, but just because of that doesn't mean the fight is worth it or not.

I'd say however that the lack of accountability by Amazon (et al) is the real problem. They should be held accountable for these fake reviews. We need a lawsuit on this.