Some of those vanity address are freaking long, it's scary !
I highly doubt they are vanity addresses that someone actually holds the private key.
More likely is that they are made up addresses, the person that crafted them made sure that the last few characters (checksum) makes the address appear valid to the network.
see https://bitcointalk.org/index.php?topic=136362.0
Edit: (added reference)
Yes, you're right !
so essentially the btc sent to those addresses are "destroyed" ?