possible security issue due to stupid users?

[Joric]

I am concerned that some users will find out the private key can be anything they want and will generate\use easy to remember keys like DEADBEEF (address:1KNrMaMfiqKzRC5fzi1gqTeDC96PAqJPZy)

How is DEADBEEF a key? I thought the Hex of a private key was much longer than that, i.e.:
9A 32 B7 50 A3 26 8C 74 79 D8 A0 F7 FE 9C 59 DF B9 09 86 9B 1B F4 83 E5 6D 11 BA E1 CC 3E 42 37

https://bitcointools.appspot.com/?k=DEADBEEF gives exactly 1KNrMaMfiqKzRC5fzi1gqTeDC96PAqJPZy