Pictures being deleted from pixiv

I just saw an entire pixiv gallery disappear. http://www.pixiv.net/member_illust.php?id=8800
A number of other artists that I like lost their pixiv gallery/account too, and it seems to be happening a lot recently, is there something going on?

really? how many others?

I hope this doesn't keep happening too much, I wish they'd warn us at least so we can save their works

AFAIK there's nothing unusual going on at Pixiv. It's not uncommon for Pixiv artists to delete their art or their accounts for no good reason. Just look at the bad_id tag.