1) Rav Shmuel did not. And, not to rehash this argument, but the psak of the Poskim in Eretz Yisrael are not binding on Americans (although neither are those of the American Rabonim; see next comment)
2) I have (as should everyone else) my own posek, who as well did not agree with the asifa and did not give the same psak. As such, who says I need a Heter?
3) To say that any decision made at the asifa is binding is ludicrous for several reasons.
a) the entire klal Yisrael was not represented (I did not see half of Satmar, Lubavitch, the Modern Orthodox, or many people who would probably be referred to as "centrist."
b) There was no consensus amongst the Rabbonim at the asifa as to what the "psak should be."
4) Defrosting: I am not sure what you would like me to take out from that גמרא . Perhaps you could please explain? (I assume the dark side joke is that, not an ad-hominem attack? :-) )
5) My total lack of acceptance of this psak does not mean that I believe that a filter is not neccessary. EVERYONE who uses the Internet should be using a filter. We are human after all, and all possess a יצר הרע. I just don't accept the fact that the only positive use for the internet is business related. hebrewbooks.org, YUTORAH, GTORAH, and the many other sites from which one can download shiurim and/or find divrei torah, and l'havdil, the broadening of my horizons by the amount of secular learning I can accomplish, are all legitimate, and appropriate uses of the internet.