Yeah well if they call/mail you specifically getting your contact from some leak database you can safely mark them as scam. As great number of them are.

Similarly you wouldn’t give money to beggars in the street because you know most of them aren’t in need of help but make money like this, scamming ppl while those that really need help are helped by various legit orgs you give money to instead.

Those scummy orgs are like these beggars manipulating you into pity. It’s very powerful manipulation mechanism and very often works. My grandma was scammed like this many times before we persuaded her to not send money to random people. Instead you should sit down, browse the list of legit orgs and choose one/few to support once a year/month with some amount.

Or you can just pay taxes if in a country with robust, developed social welfare system and enjoy.