If your team gives up first blood...do a favor and ff at 15 or go afk.
It's ridiculous nowadays with the huge snowball potential.
If your team gives up first blood, tell your team or yourself to go afk, open your lane up and tell the enemy team "my lane is open push" and let the enemy team end this torture as fast as possible. Int if you have to by running down mid, cos you don't need to waste time and energy on a lost game when you can make the game end quicker and move on to a different game without braindead idiots.
You will 95% lose the game if your team gives up first blood. 100% loss rate especially if a zed or talon or katarina or an assassin gets it. They snowball so hard and they end up running around KDA farming your team.
But this is NA's and EU's mentality, "oh we can still play to late." "oh we can still win play safe." Like nah, stfu you garbage. Korea will just open or afk and stand in base cos it's much more fun rather than a zed oneshotting even your tank quicker than you can say "wtf".