@hishamk
How is it unethical to block ads?
Well, the fact that you're perusing and utilizing a site's service (be it information, forums, etc), the least you could do is not disable their pay-per-click ads, since that's what usually pays the bills for the many sites on the web (including blogs, etc).
This is different from TV ads, in which show producers and networks get paid beforehand for the ads.
Granted, some sites are not using a ppc ad model, but most are, especially niche sites like Amiga.org. Blocking them on your machine would prevent any user of your computer from every clicking on them, which is kind of unfair, considering the fun you get from the sites. Kapische?