They would only ban you if you are spamming them with requests. There is no need to do that, the bot could add a long delay and query each node for addresses once.
But I agree that this doesn't seem like a productive way.

In my opinion the best option still remains to be including more irrelevant addresses in your query somehow. For example your own client could ask bc1q6, bc1q8, bc1q2 balances where bc1q6, bc1q8 are not yours and then when spending from bc1q2 it broadcasts the tx to another node.