Re: What happens if someone from the past shows up...
The Edo may have been dicks about this, but the senior staff of the Enterprise shouldn't get a free pass for being stupid.
Maybe they were stupid. But that doesn't mean Wesley should have died for it, that Picard should have allowed the Edo to execute him, or that the Federation is a terrible cultural imperialist for extracting Wesley from Edo custody.
"Every line of serious work that I have written since 1936 has been written, directly or indirectly, against totalitarianism and for democratic Socialism, as I understand it." - George Orwell, 1946