And my opinion. Those silly, silly people.

Actually, it COULD work.
It could be limited to say 3 trades every 6 months.
There could also be a time limit on when a game could be traded. I.e trades only available for 1 or 2 weeks.
GOG could also implement something like a trade premium. For example, the value of the trade could be a minimums value, like say $5.99 or whatever.
Of course the system can be abused. But GOG can be completely abused. I can upload my files all day if I want to. The basis of offering DRM-free titles is the belief that althought the system can be abused, the MAJORITY of people will not abuse it because they get value out of the service.

I don't really see a reason to trade GOG games. They're so cheap that most of us wouldn't even bother thinking about trading them.
Also many of us that buy GOG games do it to collect them.
As I see it the only people that would really benefit from it are those that buy lots of games with the intent of trading them and getting money or something for it.

I hope they are discovered and their accounts are banned for life. Just my opinion.

Get him, boys.

Nah. Make them explain themselves in a blog.

It's off topic, which is why I'm not going to say too much about it--except that it seems like a justification for theft. Perhaps I'm just not reading your point correctly--it's a bit confused--but it sounds to me like you're saying that simply because there's not a physical item involved, it can't be stolen.
In case I'm totally misreading your point I don't want to expound on just how wrong that idea is.