If we posit the level of technological advancement necessary to travel between stars, it makes sense to me that if they wanted to go undetected, they could easi

If we posit the level of technological advancement necessary to travel between stars, it makes sense to me that if they wanted to go undetected, they could easily do so. Putting lights on their spaceships so that thousands or millions of people notice seems extremely implausible to me. It rather seems more "considerate of nature" to watch and not disrupt by essentially studying as invisibly as possible.