I think the problem that poster was trying to illustrate is that it is unpractical to shut down a site or force a site to spend a significant overhead just cause a user could post a certain sequence of bytes to the site. An analogy to the real world would be some guy paints some graffiti on the pavement and the response, every time, being the complete shutdown of the entire city for a month or complete surveillance on every cm² of pavement plus cleaning crews standing by every 10m.

Poster does not want his favourite site going down cause of some bad actor.