decodeScrapeshieldEmails.py

def decodeScrapeshieldEmail(s):
  retval = ""
  key = int(s[:2], 16)
  for char in [int(s[i:i+2], 16) for i in range(2, len(s), 2)]:
    retval += chr(char ^ key)
  return retval
  #return "".join([chr(c^int(s[:2],2))for c in [int(s[i:i+2],16)for i in range(2,len(s),2))]])

reverse-engineered from the original javascript.