And quite stupid. Using the same address creates a lot of links that can even lead to your ID if you look far enough 
(It's been done)
(It's been done)And now they have learnt to use different addresses to claim giveaway.
Read my posts https://bitcointalk.org/index.php?topic=655092.msg7361035#msg7361035 and https://bitcointalk.org/index.php?topic=655092.msg7361277#msg7361277 for details.
BTW, the army of shills are starting to give me negative trusts and sending me PMs. I'm so scared lol.
So sad to see people like this... all that time to set up a lot of different accounts to scam a couple bitcents here and there.