Well, that's the question. In all the Internet there are a lot of programs and software tools that "injects" these virtual coins in your virtual wallet. Is that possible? I saw a lot of links to these tools getting eliminated, so maybe it's true.

What do you think?

Answer to the title: probably.

Answer to the post: it's far more likely those programs are malware of some kind than anything genuine.

Yeah, I were thinking the same, but I want to confirm it.

Sure, especially if you have inside knowledge, though I don't think it is neccesary to hack it, spoofing the system can be easily just as effective.

Spoofing the system?

Letting other people pay with bitcoins while you get the goods, that sort of thing.

Sorry, but I don't understand. Maybe my english level is too bad xD

I hope you don't expect me to explain all sorts of scammingstrategies.

Are you from the secret police or something?

Virtual product.. bound to be ways to get around any security. Wouldnt touch this kind of thing myself.

Yes, but please, don't tell it to anyone.

according to someone I knew at college (a bitcoin "enthusiast") its not only possible, but the best way to "farm" them - though he's always been a dubious bastard at best with most things, net security is one thing he does know well.
if the day comes when we need a barcode on our heads tobuy anything... i'll personally crush him... O_O

Yes, but why would you want to? I mean its already technically worthless.

I don't want to hack it, but I'm curious.

Possible, but incredible hard to do. It's unlikely that - with current hardware - anyone will have the resources [even, say, google] to break them. That they are hard to crack is pretty much crucial with cryptocurrencies. Here's an overview of how bitcoin does it: https://en.bitcoin.it/wiki/How_bitcoin_works - i.e. it is built on different cryptology tools [which are, by the way, open source and well known; how it functions doesn't mean - unless you have a key - that you can 'break it']. I.e. it's not really worth it, financially, to attempt to do this.

The bigger (and what would be 'lucrative' for someone trying to 'cheat' the system) is to con people or to break into their 'bitcoin wallets' and get hold of the actual currency. Much as, for example, it may be possible to forge and replicate money, but it is exceedingly difficult to do so well. Hence - most criminals out there aren't even attempting to forge money.

Theoretically , it is possible, yes. But not with the tools you saw, which likely only inject your bitcoins into their makers wallets.

Bitcoins weaknesses are known and documented, but since they would be quite hard and expensive to achieve, they are usually considered improbable.
You can for instance check those two (somewhat technicals) links:
https://en.bitcoin.it/wiki/Weaknesses
https://en.bitcoin.it/wiki/Double-spending