Everyone has their grammatical pet peeves. At Asylum, for example, we've made our feelings about some forms of punctuation quite clear.

But even our hatred of the exclamation point pales in comparison to the aversion Jeff Deck and Benjamin Herson have toward poor spelling and grammar, in general. In fact, their obsession is so intense that the two college buddies set out on a grand journey across the U.S. to hunt for and correct misplaced apostrophes, typos and other syntactical atrocities.

"I threw together a 'typo-correction kit' with markers and correction fluid, began planning the journey and saving up, and in March of 2008, The Great Typo Hunt began," Deck tells Asylum. He and Herson (who dubbed themselves the Typo Eradication Advancement League) loaded their equipment into an old '97 Sentra and set out on their ostentatious adventure, now documented in their new book, "The Great Typo Hunt."

"We'd stroll into a neighborhood and just check out their signage," says Deck. "Places with high text density were usually where our assistance was needed."

Each time the self-appointed grammar police spotted a typo-eyesore, they'd pull over, hop out of their car and determine whom they needed to speak to in order to make a correction. Continue reading for more on the hunt, as well as a list of their top 10 grammar/spelling mishaps in America.

"Many of [the people we talked to] proved informative, fun and fulfilling, making that my favorite part of the experience," explains Herson, who met Deck in a creative writing class 10 years ago.

Though reactions were positive for the most part, Deck and Herson were sometimes met with resistance when confronting people about their poor grammar. Common responses flung back at them included "It's not a typo -- that's how you spell it"; "Fixing it will make the sign look bad"; and "No one's ever noticed it" (aka "No one has ever actually mentioned my sorry grammar to my face").

On the other hand, some of the more agreeable the grammarians confronted actually fixed the signs right on the spot.

Deck and Herson's voyage took them from New Mexico to New Orleans to South Carolina. Naturally, we figured we'd ask which state needed the most assistance when it came to spelling and grammar.

"The truth is that across the board, everyone could really use an editor," says Deck. "The bigger difference wasn't by region, but more along the division between big chain stores -- which have pre-printed signs that all the stores have to put up, and independent businesses, which don't have the professional signage and so, of course, have more typos."

Deck and Herson compiled a list of the most frequent errors encountered along the way:

Top 10 Most Common Typos in America Today
10. Subject-verb disagreement: Lemons sure is tasty.
9. That place where you go to eat: Restaraunt, restauraunt
8. The double-letter fumble: They're shiping dinning room furniture.
7. The A-for-E sabotage: America loves its independance.
6. The confusion of tasty treats and arid sands: Try our homemade deserts.
5. The misplaced apostrophe: womens' secret society.
4. The wrong "your" or "you're": Your the best at you're job.
3. The wrong "its" or "it's": Its in a class of it's own.
2. The missing apostrophe: mens fashions
1. The unnecessary apostrophe: We sell hundreds of car's!