I call on your "no need to rehash it here." Without even one good example, I'd say you're just trying to be elitist.
Let me help set you on the right path. Google for "javascript semicolon insertion". After reading about it, it should be very apparent to you how it's a very large flaw with the language, and how it can be extremely harmful.
Do some research into JavaScript's equality operators. Any good programmer will be sick to his or her stomach after reading about how broken such basic, yet essential, functionality like that is.
And that's just the start, my friend. I encourage you to do further research on your own. You'll find no shortage of serious issues to learn more about.