I'm an outsider and watching how people get hacked:
Here are account security tips to help you NOT get hacked:

For example, if your toon name is "Justice" and your Gameloft ID is Justice, please change your gameloft ID to lower chances of being hacked.
If you name your toon JusticeFixer01 and your GameLoft ID is JusticeFixer, please change your gameloft ID to lower chances of being hacked.
b) Please setup a totally and wholly unique email address just to play the game. Don't use back an existing email address nor correspond with anyone with this email address. This will reduce the likelihood others from guessing your email address or taking over your account.
c) Please do not give any identifiable information, such as your real name, your address or telephone number unless you really know that person in real life. That other person could take your account using false credentials.
d) There is only one place for Runes, that is GameLoft itself. If you fall for Runes for Gold scam, Runes for Gift Cards, they are always too good to be true and you will get your account hacked if you give out your gameloft ID and password.
Please be careful of buying runes from a third-party. Unless you know that person really well (like your Aunt or Uncle) please don't do it.
e) Please do not give out your password to anyone or password hints, such as, what is your first pet's name? That would be too obvious

That person could take over your email account using those information.
f) When you join a forum, please use totally different IDs and totally different passwords than the ones you used for your gameloft ID. The forum could be setup to store passwords in plain-text rather than a hash. The intention is to hack your account using the same information you passed to sign-up for the forum.
g) Use different passwords that cannot be easily guessed. That will reduce the chances of getting hacked.
Please don't use simple passwords like 12345, 1234567890, etc.