j"19HxigV4QyBv3tHpQVcUEQyq1pzZVdoAutM I definitely agree that, all else equal, scale helps protect Bitcoin. So to answer your question, the 2nd is easiest to ban. Your Uber example is good. I just like to try to understand what other attack surface increase with the code allowing such scaling.
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https://whatsonchain.com/tx/4ea0a6fe77574eeecfa6c68657d93b8f5329d6a57461ed7f536fb8d31f9c004a