How do I tell this site to add something to the rulings:

It seems people think Cascade means you may basically cast any card with lower CMC in your library. They word "may" refers to casting the card only if you want to; not that if you don't want to, then you may keep exiling cards until another card with meeting criteria is revealed. Cascade rulings never say this!
In Alara, MTG states that Cascade grants you a free spell but you DON'T KNOW what's it's going to be! If you keep exiling cards after the first available free spell is revealed, then essentially this contradicts MTG's statement because you would pretty much KNOW which spell you would get!
The reason the rulings say "may" is because for example the spell may have an ability you do not desire (for instance, "destroy all creatures"); the purpose of "may" is not "or keep on searching."

If you decide not to play the first nonland card revealed with lower CMC, then Cascade is completed. Put all the exiled cards on the bott... (see all)