Just for a minute,
Let's take a good look at #4.
As we can see, the hint states "I'm sorry Dave. I can'7 do 7hat7"
As ryahn says, only staff will know this, and apparently jimmy5 as well.
When we really look at this message, obviously the 7 means T.
7 is the 7th number in the number book.
G is the 7th letter in the alphabet.
Woman have G-spots.
Now we notice how there is 3 7's.
C is the 3rd letter of the alphabet.
Chevrolet starts with C.
Chevrolet is the best initial quality brand, but that's probably a bunch of bullshit.
Chevrolet makes cars.
You know who else makes cars?
Aston martin makes cars.
Aston martin also happens to be the ones who make cars for James Bond.
You know what James' agent number is?
007.
3 total numbers, as compared to 3 total 7's.
The final number is 7, also used as a replacement to T.
So, in conclusion.
The answer to #4 is James Bond.