being able to quickly react to specific problems is not the same as having the code available for people to look through to try and find problems. Try this: it's like having a car with an engine that is designed to be possible to very easily disconnect, slide out and replace parts from it. Normally, your competitor (the hackers) are trying to sabotage bits of the engine blindfolded, and have to work by touch on your design. When they find something they can abuse, you can slide the engine out and very quickly fix the problem they're abusing. Having the source leaked is like the hackers being able to see your original engine designs. They can much more easily find the weak spots than simply by feeling for them with their fingers.
By the way, I believe that even distributing / downloading /possessing the stolen sourcecode and other resources is illegal. I refer everyone to:
http://www.usdoj.gov/criminal/cybercrime/ipmanual/08ipma.htmThe only contestable part as far as I can see is that it requires it to be done knowing the economic benefit of another or harm of the owner. I think any reasonable lawyer could argue this [harm] in court, regardless of what anyone here personally thinks about how Valve was or was not harmed - lacking moral judgement is only a defence in court if you're psychologically incompetent as far as I know.
PS. Source code is not the same as compiled code, which is what would have been accessible for Steam to change.
This comment was edited on Oct 13, 11:38.