Best is to avoid altcoins all together and just stick to bitcoin that you store in open source wallet like Electrum or even better hardware wallet. That way you dont have to worry about these types of airdrop scams
Not everyone can afford to buy bitcoin or ethereum at the current price, most newbies enter crypto space by hunting for airdrop, when i start my crypto journey, i was hunting for airdrops until i raise some money to start investing in other coins, I think the advise should be, avoid scam airdrop, this year alone, there are some airdrops that have gave some people some good money. Also when asked to connect your wallet for an airdrop, don't connect with wallet you have some coin inside.
you are right, airdrops are giving high income in recent times but it is very hard to find potential airdrops because they only distribute tokens to eligable participants, we have to be careful using wallet not to connect to dex or new projects.