How can I tell if a player is either scripting or botting?

I had a few games where either a player was pretty hard to beat or another player kept running into the enemy team continuously. Some of my teammates claimed the enemy was scripting, where he uses different types of code for an advantage. Some other games (mostly in the Twisted Treeline in this case) seemed to have seemingly unskilled players keep feeding non stop and they never spoke or pinged throughout the entire match (in this case potential botting, where a third party program plays the game for you).

So I was wondering how I can tell a player is indeed scripting or botting so I can act accordingly.

(I apologize if this is in the wrong catagory.)