Those are problems with the exchanges, not with bitcoin. Just like problems with boo.com were a problem with a website, not the internet.
People need to chill. Understand that this is all experimental and outside the regulatory framework, so the "sticks" that govts wield to make sure customers don't get ripped off arn't there. Plus lots of the exchanges were literally started by one person, and they didn't expect a flood of people coming in believing it would all work like the NASDAQ from day 1.
Personally I think it's a fun experiment, and if you understand that it's operating in a parallel world outside of mainstream regulation, it's a fascinating insight into how a world with no regulation and existing infrastructure works. All the infrastructure is being built from scratch - it's a bit like Manhattan in the 1600's - just a hostile piece of granite. I think the problems people cite are due to them going in expecting all the extreme profits of an unregulated world with none of the downsides, which is naive to say the least.
Also - resist the urge to "trade" - traders tend to lose their shirts whether they trade penny stocks or oil or bitcoins. Buy and then hold, and enjoy the whole experiment. And only buy with fun money that you won't miss if you lose.
Who knows, it might be like the Rockefellers bagging a bit of granite and finding out it turned into New York - or it might turn out to be nothing but an "experience" except more exciting than a weekend bender. Just enjoy it and don't fret too much.