Lol, at least you're honest. I'm afraid I have no sympathy for you though. I don't know what 'actions' you are talking about, as I understand you can be interdicted in any system at any time. Perhaps you just mean solo play? If so please consider that some people want to enjoy a multiplayer game for more than just ganking newbies.
What would there be to be dishonest about? Piracy is a perfectly accepted game style, and has nothing to do with ganking newbies. It's a legitimate way of making money (barely any though) from player interactions.
As for actions you can take to avoid losing big, there are a few:
Pick your trade routes with care. If there is a lot of cobra activity, avoid it. Be aware of the fact that any trade tool you might use, pirates can use too. If the route is very profitable to you, it will be just as profitable for a pirate lurking there.
Don't fit 100% for cargo. Your internal slots can hold shields and shield cells, use them. Upgrade thrusters and power distribution. Everything to make it easier to boost the hell into supercruise (the game makes this very easy for you already, capitalize on it).
Don't fly alone. It's a multiplayer game, one of the risks is obviously that somebody will want your stuff. One of the perks is that you can find help too. One well flown type 6 is already hard enough to pirate, with two of them you could actually turn around and fight the pirate off.
If everything else fails, well, you always have the option of dropping some cargo. That's the simplest option, it doesn't game the system in the lamest way, and it can even lead to further interesting interactions (if you really really like that trade route and don't want to leave just because of one guy, offer the pirate a regular share of your profit, add him to your friends list and you might turn him into your very personal bodyguard...how is that for enjoying a multiplayer game for more than just ganking newbies).