It's far more likely that there is nothing else out there that is capable or interested in communicating with us than it is that there is some destructive force that actively seeks out and culls intelligence.
What makes me say that? Well, historically speaking, every time we've convinced ourselves that there's been some superior force or being beyond a certain boundary, we've been wrong. "Here there be dragons" and all that. Every time we've gone beyond the known world, instead of falling off the edge of the earth or being eatten by sea serpents, we've instead merely encountered the mundane.
For example, breaking the sound barrier was only exciting because we imagined all sorts of terrible possible consequences of doing so, but it turns out to be pretty boring in reality (aside from some curious Physics involved). What was once beyond imagining, literally the stuff of myth and legend, feared for the remote possibility that it could be poised to destroy us once we crossed the brink, ended up being just one more quirk of the natural world.
Space is big and empty. If there is other life, it's probably not intelligent. Even if there is intelligent life, it probably can't detect us. Even if it can detect us, it probably can't communicate with us. Even if it can communicate with us, it's probably not capable of space travel. Even if it is capable of space travel, it probably can't reach us.
And even if, somehow despite the odds, it turned out there was intelligent life close enough and advanced enough and perceptive enough to communicate with us? Can you imagine first contact?
"We've received a message from Outer Space, that we can confirm is from aliens! We need to figure out what it says!" So we work it out, we think we've decoded the message a little, and we send out our own response. Then we wait. And wait. And wait.
At best, decades pass - at worst, centuries. During that time we might receive further messages, but they'll have been traveling for a long time, coming in staggered. The conversation is one way until our reply reaches them and they have a chance to reply in turn.
Generations slowly pass. We've made a handful of back and forth information trades, but the time lag and the difficulty of understanding each other means the information traded is absurdly small. We've parsed each other's numeral concepts, we've maybe traded stellar coordinates, possibly even mutually conveyed a means of swapping the information necessary to contruct images from raw data a la binary, allowing us to trade images.
Meanwhile, how has life on Earth progressed? At best, due to these developments we've become more reflective and thoughtful, had some positive paradigm shifts on a philosophical level, maybe reformed some religious beliefs along the way (unlikely). At worst, the confirmed knowledge of other intelligent life in the universe has brought out the worst in humanity, sparking conflict and fear and stupidity. Although it's also just as likely we've simply carried on exactly as before, now aware of alien life but entirely untouched by it.