We have diverse view on the validity of airdrop. I personally believe that airdrop is a good start for someone coming into the cryptocurrency space. It gives one the opportunity to learn from the scratch and experience the effort it takes to earn from this space. It may serve as a deterrent for greed as the cryptocurrency space is not a get rich quick scheme.
Airdrops collecting isn't that bad. It's a good way for a newbie to collect some money and experiences throughout the works! The point is not about worthy or not. The point is that can you do good research to choose a good airdrop? When you participate in a good airdrop project, it's totally worthy. It's even more worthwhile when you join in a junk airdrop project! When you do that, you'll receive back experiences from your failure! Either way, it works!