it's a good idea. but, i don't agree with you.
some days ago, i wanted to add dex some pkms from a player(i forget his name) then i asked him about kabutops, he said that he has kabutops but his kabutops's used for pvp(strong pkm with good iv). he doesn't want to help me. i told him i'm not a bad guy. finally, he gave kabutops to me and i gave it back to him.
you can see, we add friends together after that. the important thing that how you make peoples feel the trust from you. the game will be more fun.