They're like space lemmings! Can you imagine the shennanigans Kerbals could get into with access to FTL drives and [u]no[/u] idea how to use them? I wonder if they'll even have any real concept of diplomacy and interspecies relations? I imagine that they'll just casually attempt to land in an alien's home system a few dozen times, finally succeed, and then never visit again. Likely they'll leave Kerbals stranded in odd places throughout the galaxy.

They're going to die [i]spectacularly[/i].