Well, I do not want to say more about this thread actually, which may cause endless argue and quarrel. This is not the usage of this forum and will bring confusion to people seeking help here.
As you request, just say something of my own opinions.
I think we should distinguish the tool and the person who use the tool.
Should the person create knife be claimed by the sin of killing using knife?
Why should we give the prize to powder invention?
Why don't we put the weapon creator to prison?
Decompiler is just a tool. Its purpose is to meet Flash creator's need. It is not create for "theft" or other infringement.
Why impute the sin of people to the tool? Remember it's person want to steal, not tool. Tool has no sin.