RuneScape:Wiki Post/Other stuff/CryptoChallenge 2

If you're unfamiliar with cryptography and cryptology, see the introduction at CryptoChallenge 1.

CryptoChallenge 2
This challenge is based on Hallowe'en quotes and sayings from famous people:

Easy
Hint: Caesar's cipher (positive or negative shifts)

FA EGRRQDUZS FTQDQ UE M XUYUF; FA RQMDUZS, ZAZQ. -EUD RDMZOUE NMOAZ

CRKNYGC YP K DRYECKXN IOKBC BSCO KQKSX EXCOOX, FYSMOC GRSCZOB SX DRO DBOOC, "DYXSQRD SC RKVVYGOOX!" -NOHDOB UYJOX

DRO YVNOCD KXN CDBYXQOCD OWYDSYX YP WKXUSXN SC POKB, KXN DRO YVNOCD KXN CDBYXQOCD USXN YP POKB SC POKB YP DRO EXUXYGX. -R. Z. VYFOMBKPD

MGM WN VMEB, IVL BWM WN NZWO, EWWT WN JIB, IVL BWVOCM WN LWO, ILLMZ'A NWZS, IVL JTQVL-EWZU'A ABQVO, TQHIZL'A TMO, IVL WETMB'A EQVO, NWZ I KPIZU WN XWEMZNCT BZWCJTM, TQSM I PMTT-JZWBP JWQT IVL JCJJTM. -EQTTQIU APISMAXMIZM

Not so easy
Hint: Combination of Caesar's cipher and the hidden key cipher.

Hidden key: All Hallow's eve.

AIDVD YIDVD JX RS JQEGJREYJSR, YIDVD JX RS ISVVSV. -XJV EVYIZV BSRER CSOPD