I think that would be enough. But that means I assume that everything must be
valid as all block files are valid. I really don't like that kind of assumption though.
Take the binary file editor, open one of the oldest files ( for example blk00005.dat )
and change some data in it. I am quite sure that the bitcoind on your node will not
discover any problems.
Next time I will ask you to write a small program which intercepts network traffic
from your node to 8333 ports and puts some garbage in it.
