Novowy will give you a working solutions for 30 bucks.
However, it's better to do it yourself anyway and gain some technical experience if you are planning to do something more than airdrop-dump tokens.
1. Create Google Form about the airdrop
2. Delete suspicious accounts from Google Spreadsheet with the Airdrop data
3. Use some API to send tokens.
It will cost you a lot of gas anyway.
In this moment i'm sending everything manual! I would love to us a API that can do this job! If you can explain me how to use this API i will pay $50 in BTC!