If you were to cry nonstop all day, would it annoy your neighbors?

Depends on how you cry. If you are the weeping and wailing type, then I'd certainly hope so, but if you are the bury-your-face-in-your-pillow-and-sob-quietly type, then if it did, you should start checking your place for hidden cameras...
Hope it helps... =P

Lol no because I cry silently...if I cry the way I NEED to cry then you I guess they'd get tired of my full-out SCREAMING XD because thts all I feel like doing when I'm crying silently but I don't because then I'd feel like a total ridiculous idiot...lol :p

If your neighbors could hear you than yes.