Fallout 76 recently received a patch that can only be described as backwards, much like the new ban wave. Bethesda reportedly banned several players for simply crafting items, and locked them out of any Bethesda.net launcher games.
Several Fallout 76 players have reported that they have been banned for simply crafting more than one copy of an item. This happens due to players needing to scrap the items for parts and learn new modifications, which is a game mechanic that Bethesda implemented.
As you may be well aware by now, the game was effectively rolled back to an old build with old bugs in it when the latest update kicked off. This brought the item duplicating (duping) issue back and it seems like Bethesda managed to notice this, unlike the game version they were patching, and we assume this is why they started banning players they suspected to be multiplying their items.
It appears that they don't have any means to differentiate dupers from regular players who craft several copies of the same item and are banning both. This resulted in a string of bans where players got suspended for simply crafting items. While these permanent bans are ridiculous on their own, Bethesda managed to mess this issue up further, by restricting banned players from accessing any games on the associated Bethesda.net. account.
Reddit user going by the name Matthew486DX posted the issue he encountered, after being banned for the same "infraction" as the other users who dared craft some items. Bethesda simply sent an email his way, saying they banned his accounts and he had four days to respond, after which it would presumably be banned permanently.
Matthew responded, but Bethesda apparently paid no attention, as the provided .pdf version of those mails suggests. The user can no longer log into his Bethesda.net account, effectively meaning he can no longer play any singleplayer games he had on it. In other words, he got banned from all Bethesda games associated with the account, simply because it looks they wrongly banned him in Fallout 76.