Yea, you would never be sure, but the former practice from Blizzard do proved, that when you are botting, only the caught licence get actioned.
The non-participating accounts in the botting activity do get actioned, only if you get caught into severe exploitation like Massive Gold-selling, duping, etc.
And again, usually they do not monitor non-flagged licenses, aka these never involved into exploitative activities.
So you are perfectly safe, as long as you do not cross the border on this battle.net. (And crossing border means, if you bot on another 10 accounts from the same machine, too)
I asked a GM a similar question and got this response

No you will not get banend on that account, if you havent botted on it ofc.
Asked if i transfer the lisence on the banned account to my legit account if my legit would be banned.
This is the latest response from Customer Support:
Greetings xxxxx,
That kind of depends on what specifically you trying to do. A WoW Account can never be merged with another wow account. But if you have a wow account on a different battle.net account under the same name that could be moved into your battle.net account here. The "moved" account would no longer have access to the mounts/pets/achievements of the old battle.net account but it would not be affected by the ban.
Account penalties are always specific to one WoW Account and dont affect other wow accounts.
Transferring game licenses is something we can help with in some special cases, though we must refuse a lot of these requests to eliminate account sharing, trading and selling as much as possible.
Regards,
Gamemaster Limandrelle
English Game Master Team
Blizzard Europe
What does the “Answered” status mean?
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Regards,
The Customer Support Team
Blizzard Entertainment