So far I have not experienced any type of internet crime personally. However, I do know an individual who participated in online scams. He set up fake accounts on Ebay and sold products to users and did not send them. He made a lot of money doing this and stopped before Ebay had fully protected itself against that type of fraud.
To be honest I have taken very little precautions to this point to prevent myself from crime. I have the standard virus scanner and don't save passwords. I guess the anonymity I feel at home while browsing gives me a sense of invincibility which I obviously do not have.
I have sympathy for struggling people in countries that need economic growth. I also don't necessarily think wealthier people getting scammed as a whole would be that bad of an idea. The only issue I have is that I don't feel the people that really need to money are getting it. Those who are smart enough to scam wealthier countries also are probably wealthy in their own.
Tweaking with an online public forum like Wikipedia does have ethical issues. In that sense I think it should be treated just as journalists are treated for printing unethically. This helps to protect a society that depends extremely on the media's ability to tell true and accurate stories quickly. That being said, I don't think Stephen Colbert is a criminal but I do think he should have some sort of reprimand for his behavior.