No it really doesn't. Anyone, even Anonymous Monk, may post whatever they like. Their post will be accepted and will be displayed to any logged-in user. What it goes against is broadcasting seriously dubious content which is precisely how things should be.

Careful. There is no broadcasting involved here. Any information which leaves this site is polled, not pushed - it is up to the recipients which parts they retrieve. The analogy to Radio and TV is flawed. This site is more like a public library with private and public gathering zones attached... well, more like a Monastery ;-)

What use is a Speaker's Corner if, at the arrival of the senventh disagreeing with me, I am (or my words which count at that) are removed from said corner and can't be heard anymore, except for a handful of insiders connected to me anyways?

For plain off-topic things, ad-hominem attacks and such we already have the consideration process.

a similar manner, if anyone wants to read such poor content on PerlMonks they merely need to login.

As I tried to explain, even poor content is educational in its own way. And then, there are many ways in which some content might be considered to be poor, reflected somehow in the vote tally, which is by any means collectively subjective. Establishing a number of negative reputation as a measure of quality isn't something I can agree upon.

Then, there might be a significant amount of Anonymous Monks which just don't want to sign in anymore based on past experiences. Abigail-II comes to mind. And they might provide valuable information to nodes voted negative on purely technical merits (which should always be the case in some sense of purity), and providing this valuable information on a technical basis.