Yeshiva Net is the way to go. It is NOT a filter. (filters passwords etc are not foolproof). With Yeshivanet you are NOT connected to the open internet. ONLY sites that are specifically requested and approved are connected.
It won’t work for people that do research surf the web etc. For people who need access to the same 20-30-60 even 500 or more sites it is fantastic. If one needs to access an additional site it is added in a very prompt fashion.
side advantage: Yeshiva net will save a TON of wasted time besides for the significant issues discussed in the letter.