Running an add blocker on this site is the same as stealing from BYC. Your access to this site is paid for 1 of 2 ways, by adds, or by a PFM, if you don't have either then you are accessing the site for free. If enough people do that, the site will no longer make enough money to support it's self (running a site this size is expensive) and it will no longer exist for you to use.
Well, this might be the way you feel about it. Just feel free to klick on some more ads to support BYC, but there are more ways to do it.
As there are a lot of company website operators that track the users every move using consumer advertising, some users are just not willing to get spied on and thus lose their privacy.