@sneer,
"...philosophies are spread neither by dialogue nor communication, but usually by one-way evangelization."
First, I am not sure this is quite true. Surely, for example, the Critique of Pure Reason, or Being and Time are not evangelization, but more an attempt to create a dialogue with the reader, to communicate ideas and positions.
If anything, isn't what is spread by mass-media of all sorts more like propaganda than philosophy? I have not heard of a mass-meeting of desperate and enthusiastic Neo-Platonists ready to march on Paris or Washington.
Lastly, doesn't the freedom (at least so far and a few repressive nations excepted) of the Internet, while admittedly making the separation of the wheat from the chaff difficult, actually open up the possibilities of authentic communication by encouraging more philosophic communication, even from isolated souls in the hinterlands perhaps of small towns in the Bible Belt? This may seem somewhat Victorian and an imitation of J.S. Mill, but isn't a certain amount of chaos one the best ways to fertilize real thinking and new perspectives?
Cheers,
John