Ok, this kind of blew my mind. This video is a discussion on how we could hide our planet from any pesky alien civilisations using lasers to trick their planet finding techniques (assuming they are similar to ours).
Even if we think the probability of an alien civilisation detecting life on Earth and acting is very low, this might be a prudent measure. At the very least, we should stop intentionally sending radio signals to nearby stars. It’s surely just not worth the risk. The most likely scenario is that there is no one there. If there is, the downsides (they eventually kill us for resources) surely outweigh the upsides (we become friends(?)).
I won’t say too much else, the video will do a better job at talking about the details. Just one thing I’d like to add which I don’t believe was covered by the video is this:
A ground-based laser obviously wouldn’t cut it, since the laser would need to be at the farthest point from the sun at all times. A satellite mounted laser at the L2 Lagrange point though would be perfect.