this may actually backfire for japan really badly tbh means go ahead do it i have my dvds though some of the manga i read isnt translated and i have to get through fan sites but i can live with that. but the point is anime does not make its money only by watching it generates a crowd much merchandise and in turn much community hype and many more ppl trying it the thing is when you look at an anime some people have opinion of an anime the second they see the cover so if you just go ahead and are usually persuaded by others who did watch it and most of them watch it via these sites and thus the hype starts to build up and spread around now if less people have access to it that means less word will get out less hype will build less sponsors will be interested
Edit. Also if anyone wants to point out that what about the ones that watch anime by buying it the thing is hundreds of series are released each year and less than 1 percent all of them actually closer to 0 so the thing is most of the anime will not get the word out and/or have such a low audience that it dies