That point is reached far more often than many people imagine, and often far closer to home than they imagine, because human rights abuses are typically incremental and selective rather than universal and ubiquitous.
If you look book at the the canonical bad exemplar of nazi Germany, hindsight leads people to conceive of it as a juggernaut-like attack on all jews, communists, homosexuals etc., but in reality it was a scattered and uneven aggression over a 12 year period whose aggregate effect was massively genocidal.
Huge unstoppable genocidal actions that are highly coordinated and happen over a very short timeframe do exist, eg the Turkish genocide of Armenians or the Hutu genocide of Tutsi people in Rwanda. But I believe they're atypical in modern history compared to incremental genocides. The latter can end up being worse because they're easier to deny, dismiss, or ignore as abuses accumulate.
In the specific example, an authoritarian government could not only ban the product but arrest corporate officers/employees; if there are none in that country, it could arrest people attempting to use the prohibited product, or create fake access portals that were actually honey traps.