If you make mistakes like those made by the author of Yahoo! Sports‘ “Puck Daddy,” you should consider letting someone take the reins and edit your work:
If you don’t know that a monarch reigns and a horse is controlled by reins, you need a little editorial support.
If you’re writing an article about Glen Gulutzan, the editor might let you know if you misspell his name:
And if that editor knows that whom is the objective case of who (and is therefore correct as the object of a preposition), hand over the reins. Just be sure that the editor knows that when a subject is joined by or, the verb (which should be is) agrees with the noun closer to it: