Can I use regular CPL filters as rear drop-in filters?

For those lenses that require to use a rear mount drop-in filter like the Nikon 300mm 2.8 or Canon 400mm 2.8L, can I use regular screw mount 52mm filters on them? Or are they specially made for drop-in only?

Some rear filters slide down to a slot at the back end of a lens. Some lenses have a small depression at the rear for small circular lenses. Then again, there are some that screw in to the rear element. You can do whatever you want as long you know what you're up to. I'm pretty sure the back end of whatever lens you're holding right now won't accept a regular 52mm lens filter.

Look at the mount end of any lens. Now look at a 52mm diameter filter. Do you think a filter that size can really be used? Of course it can't.