I found in Wilders' a link to dak's customblocking list. I had not known that feature of SpywareBlaster before. I read the stuff, found it useful and trustworthy (because recommended in Wilders) and installed it. SpywareBlaster warns: "Please be careful when using a Custom Blocking List someone else has created." Therefore I would like to ask the following questions: 1) Is dak's customblocking list really trustworthy? 2) Could there happen anything to the integrity of this list through mishandling or malware? 3) Is there a way to verify the integrity of the list? 4) Are there other reliable customblocking lists and would it be useful to merge it/them with dak's list? 5) Do customblocking lists only affect MSIE browsing or are they also relevant for Firefox browsing?