I have posted my address to various sites/forums too and so far it is not hacked yet. :p
Maybe because it only has very little amount not enough to make the hacker interested on it.

Don't worry about it, the chance of having a collision is extremely extremely low.
And no, it has nothing to do with your low address balance.
You can find 3 addresses with over 130,000 btc on each of it, and those bitcoin are safe.
https://btc.blockr.io/trivia/address 