The “private person’s name” that the mosdos fundraisers are displaying on your caller ID is in all likelihood the caller’s actual home phone number that he’s calling you from
Sometimes it is, sometimes it isn’t.
And that is above board.
Maybe if it’s a volunteer. Not if it’s a professional telemarketer.
That’s not to say it’s g’neivas daas, which is a technical halachic term, and I’m not qualified to determine that.
It’s just a bit shady, in my opinion.