NO!!! say it isnt true Eric

I once were charged with doing that legally (the only copy of the source burned) and ended up wasting a lot of time before throwing it away and just coding the thing - and this was even assembly code.

is, indeed, true.

Erik

PS
I do believe that if you have an extremely fancy algorithm, there may be a case for protection; however 'just do it' code does not come easier with a disassembly in hand.
There is, of course the case of someone copying your code without even bothering to disassemble it, but there you have one of two cases:
1) the market is so small that the cost of copying a protected ROM is prohibitive - or
2) the market is so big that you can afford to sue for copyright infringement.