I do notice it to, there are lots of misunderstanding of sending information on participating campaigns some participants sends their private key instead of their address and this can lead to another victim of Hackers.
On my experience on participating i notice one of participants who accidentally put his/her private key on the address information, you can tell it even by just looking. As you notice in myetherwallet all address are started at 0 digit and x character, first of seing his address with an starting string of 45c76***********************************************************(if im not mistaken) I already noticed that its not an address rather a private key.
To check whether my conclusion is true I accessed his/her wallet and It surely are the private key so I check the balance but unfortunately its been already emptied I already saw the past transaction 14 hrs ago 5 different token had been transfered into different account.

So everyone should be inform and warn by these, better review all the information that you are about to send on others.