Benny, if you play LoL on a regular basis each day then you will fully understand where i'm coming from, but it seems you don't understand.
Most of the bad players, trolls and feeders don't even reply or listen when you try to be nice, so the next step is to be a little bit more direct with them.
I don't need to look at my own play thanks, especially when i'm in positive scores each match and mostly carrying the team.
If you repeatedly tell your bot lane not to feed, face check bushes and play safe...but they choose to ignore you and feed....then what do you do?