Airdrops can be great and something we are likely to see more of as ICO's try and take advantage of the possible network effect airdroping can bring.

Something to be aware of though is that there will be increasing numbers of bullshit "ICO's" trying to capture ppl's data through airdrop signup. A lot of the time your data such as email, investment habits/volume, age, etc will be worth a lot more than a couple of their tokens. Even more concerning should be the potential for scamming by "ICO's" requesting private keys for your wallet, in exchange for their token. This is obviously an obvious no no for most but noobs can and will get caught out. To be clear: UNDER NO CIRCUMSTANCES DISCLOSE YOUR PRIVATE KEYS!