if you share your private key and take pat in airdrops sharing private keys there is a chance of hack.. never save private key in vulnerable areas
For me it's a yes eventhough myetherwallet is very secured and very trusted it can still be hacked by the hackers if we will not keep our private key or it surely hacked if we will send our private key to other people but as long as we keep our private key secret there is no chance that our myetherwallet is we will be hacked.