Despite what I said above, I have to add an aside. Many years ago, I found myself suddenly out of work, it was totally unexpected and put me in a very awkward situation. I made a post on Facebook to say what had happened, I posted my bank details and asked for help. A couple of people messaged me directly to ask if it was a genuine request and a handful of friends sent me some money which got me out of that situation. It took a while but as far as I remember, I paid them all back (if you're reading this and I didn't pay you back, you know how to contact me).
So this can, and does happen. It's not always someone trying to make a fast buck out of their friends generosity.