Read it again, in section A.1:
“Current available filtering and restriction systems do not provide adequate protection and therefore the following takanos apply even in regard to computers with filtered or restricted Internet access.”
A bit later on:
“Parents may not have the Internet in the home unless it is l’tzorech parnasah, and have obtained written permission from one of the designated Rabbonim.”
So, it seems to me that there is no heter to use the Internet for a site like YWN – only for work. Basically, what you’re saying is, if you have it for work, it’s ok to use the internet for other things also. In effect, only someone who needs the internet for work is allowed to see YWN, other people aren’t allowed – the Rabbonim stated straight out that filtering software isn’t good enough, and you can’t have the internet with a filter if you don’t need it for work. Is that right?