Well in real life if someone wants to get into your home and rob you can only deter them from doing so. There is no fool proof system although the more complex it gets the more skilled burgler it will take.
Internet is the same way in most respects.
So far the best options in
EU are to keep your computer virus and spyware checked on a regular basis. Get a decent firewall and check the settings. Don't download unknown programs especially ones that say things like "Rare resource map you'll be rich in
EU" Change your passwords on the forums and
EU, make them a bit complex as well. Last and most important -
GET A FRIGGIN GOLD CARD