That is big concern they should have to implement something to get rid off from scam projects. This kind of project will build bad image of this platform we need legit project like on ETH than it will get real attention.
Waves is a fantastic platform and smart contracts is a strong addition, but the smart contract airdrops Im afraid will lure people in to smart contracts that only let people buy but never sell at any price
Airdrops is a nice way to attract people to watch their projects. But it's always important that people do their own investigation before they want to buy am token from the dex. That also for those smart contract airdrops.