The concept is a little silly. What could you put here thats safe for work, when the ZV header is already at the top of the page? Puppies? Foals? If you MUST monitor ZV every day during work hours, take a break, go outside, hit a bathroom stall. In other words, be an adult about an adult site.
That said, there already IS something of the kind. There are two pic-post threads. One is pretty explicit, but not specifically beasty. The other is strictly no bestiality and no genuine porn. However, our biggest problem with the second one is knuckleheads posting any damn thing they find, without a care for the requirements of posting there. When called out about it, that type gets really shirty and argumentive. Split hairs are for bbq spits.
In other words, kiddies....theres no way it will EVER be safe to scroll THIS site at work. Grow up