Reserved Bitcoin address for examples? Is there a reserved Bitcoin address? 

It should not be able to send bitcoins to it. But the address should be syntactically valid.

Such an address could be used for examples/documentation, without advantaging the author. Similar to example.com.

Wikipedia and bitcoin.it use bitcoin:175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W. Is this a reserved address or is it owned by someone? (resp.: could you send bitcoins to this address?)

If there is no reserved address, which should we use? Simply take a valid address and replace the first digit with, say, a "9"? (would this be future-proof?) Or use a testnet address?
The address is invalid because the checksum does not match the provided address. For more information see here: https://bitcoin.org/en/developer-reference#address-conversion