Methods? Then your awareness is just a simple stuff that would help you out and determine which is a scam project or airdrop. Research up things and if you do find that its somehow fishy and doesnt have a clear roadmap or plans then better doubt on it but since you do talk about airdrops then it does mean you are not risking something or money since we dont invest we are just making task or required informations for us to join on these drops.As long they are not asking too much personal then each airdrop is worth trying to join on but dont expect too much from them since most of those coins are just total crap.