sharebigfile.com is pretty fast for me too!
I do not agree with sheri. I think mediafire would not go and delete the files unless someone complained. mediafire love the traffic too, so the more people go to their web site the better. I think maybe tvb has complained about that. And if i noticed that sometimes the files stay for a few days, sometimes got deleted the next day. And when a file got deleted, all files were deleted. That means they do not do it daily. Maybe tvb will check and report an abuse to mediafire every 2 or 3 days, and mediafire will take action everytime they received a complaint. And sheri, your file never got deleted because you did not post the link in public. Once the links are exposed and tvb spot it, they will tell mediafire to remove them.
So in my opinion, there is nothing you can do about it. Creating a different account will not work as long as the links are posted. To prove my theory, someone can create an account, upload the tvb episode, and give that to 原次郎 and tell him to publish the link. I think soon after you've done that, the file will be removed.
Sorry if I typed too much.