It's like "sugar free" and "green", meaningless unless it's regulated, policed and prosecuted.

As others have said, the best labelling system we currently have is the licence that's attached to the software.

Mind you, that in and of itself is not sufficient, since the source code needs to come with it, and arguably the ability to actually compile it, neither of which are guaranteed, again more requirements for policing and prosecution.

Also, when I say policing, I'm not talking about the law enforcement community, I'm talking about developers and end users paying attention and calling out breaches.

Whilst contemplating all that, this costs money, something that is in very short supply within the wider open source software community and what little there is, goes to pay for food and lodging for a very very very small group of developers.

Fix funding and you can have all the stickers in the world, in the meantime, nope.

So, somewhat disappointedly .. no.