If you are newbie and you are looking for ways of making some Bitcoin and other altcoin, be very CAREFUL with AIRDROP campaign as many of them out there are out to scam/milk you with the little ones at your disposal. Sometimes, they are out to get your personal information like email address, etc and sell it out for money.
Some of them will tell you to send some amount of BTC or ethereum to their address as fee for you to get the aclaimed airdrop reward of which they will later run away and mute their telegram channel.
Be warn is to be armed.
All your warnings are very relevant friend. Airdrops are just fraudulent ways devised by scammers nowadays to swindle newbies, greedy and innocent persons of their little hard earned efforts. Bulk of these are on telegram and other social media. Besides scamming people of their money, some created airdrops to get peoples data/documents to be used in another place, attracts users to their telegram channels in order to be used for other purposes among others. Don't be too greedy and be extra careful before you opt in for any airdrop so that it won't be a waste of time and other precious resources.