Absolutely. I fully believe that we're part of a large alien experiment, and we are on a class R6 Zoo Biosphere (planet); and the main reason we haven't found alien-life yet? Because they don't want to be found, as it would ruin their experiment.
Back in 1977 some researchers for SETI discovered an odd signal when searching for possible ET-related interstellar broadcasts. This is now known as the
Wow! Signal. There is ample evidence that suggests this signal is of extraterrestrial origin, and that it came from one of the ET's biosphere regulator devices that is situated knew Jupiter in conjunction with the Sagittarius constellation. Independent researchers have noted that the signal is very similar to the frequency of the Hydrogen line, which suggests that it wasn't just some random space occurrence, which further suggests that it was created via an alien device most likely used to stabilize our biosphere's environment. This has all been verified by independent researchers, many of which I know personally.
Irregardless, the strongest evidence for this is the fact that we haven't found alien life yet. The universe being so large; we would have found some ETs by now.
ETs don't want to be found. They perfer to control from the sidelines. They introduce different elements into our world slowly, then they watch how we deal with those elements. 9/11? Probably the ETs, or at least ET mind-control over Arabs which caused them to do it. ISIS? Most likely ET influence as well. Once you start seeing the pattern it's easy to spot when it's happening.