It's basically a Sybil attack on public discourse. Sybil attacks, when conducted for any reason, do in fact almost always lead to the destruction of the network being attacked.
> do in fact almost always lead to the destruction of the network being attacked.
Only if the network relies on each identity corresponding to a "real" person. Some networks, such as Bitcoin, couldn't care less. Some networks can be DOSed, but not very well, and with simple mitigations, like Bittorent.
