Bigboy – Thanks. I believe I do know the halochos quite well and would be grateful for a Mekor in Shas, Rishonim or Achronim for davka giving to people you are not friendly with. As it happens, sevoro says fakert. Being marbeh reiyus (I think that’s more the pronunciation), is mashmah there is already a reiyus between you which you are being marbeh (loshon ribui = more, you cant have more if there isn’t anything there already).
It sounds to me an urban myth…….
So, source please.