The thing is they don't seem to understand how scanlation works. Do they think the people from Mangafox are the ones translating everything? Taking down(which they won't) the manga/something sites won't do anything. Scanlators would be actually happier if that happened! And scanlations are the reason most series are popular to begin with, I wouldn't pay for a product I'm not familiar with; I want to read a few chapters before deciding if I like it or not.
I understand their feelings, but like many said, they're not losing anything because it's not money they intended to gain in the first place. They don't see us as potential customers until the fan's translations have done all the work. I'm in love with a particular manga right now and I actually buy the magazine and volumes online, but the shipping is ridiculously expensive and in the end I don't get a product in my language. I think the solution would be to sell an online version of the magazine in English that costs the same as the physical copy in Japan. I would pay for that.