Please stop putting your team behind when you are ahead.
Too many times lately I've been getting people that just because they are ahead, they come over to your lane to gank, dive in tower and proceed to die just so they can get a kill, also people who try to go alone against 2 or 3.
Please realize that, even if you get a kill, if you die, you are putting the person on that lane at a disadvantage, because now the enemy has kill(s). Even if you are 10/8/0, and you died 4 out of those 8 times on a different lane. It is very possible that now that lane is WAY behind even if YOU are slightly ahead.
Even worse then you proceed to be toxic because that lane is losing and saying you can't carry just because you are somewhat positive on the K/D ratio.