I was just thinking, when the ecchi filter blocks a page, it says that the page was either moved or doesn't exist, and that seems to me like it could be really misleading... Since that's not actually the case when the ecchi filter is off, it would be nice if there could be a different notice. Maybe stating something that lets you know it blocked a page with ecchi material on it, rather than having the same message if you had encountered a problem with a page.
EDIT: Maybe a more clear explanation...
Rather than seeing this when the filter blocks something:
http://img852.imageshack.us/img852/4774/110308195257.jpg
It should just say something like "Ecchi material blocked"
Otherwise it makes you think the page is removed, and you might report it for some reason ^^;;