All good advice. Be careful of the websites you visit. Any website that is based on Wonderland Online, or other online games, but is not an official website, could be a possible threat. That includes WLODB.com although, I've been a member of this site for years and never have had a problem.
Basically, getting hacked means someone learns your user-name and password in some manner that you never knew about it.
Don't confuse getting hacked with getting scammed. Getting scammed is when you trust someone, or some site, and give away your user-name and / or password.