Is it wrong for me to pop off on the enemy team after game? but i just dont give a shit

I have been League for around 2 months. At first i liked it cuz everything seemed fair. Most people used the term "Stay in your lane". But as you get higher in level and i supposed "skill" you encounter the gang banging mf of League. These people im talking about arnt the people who team fight near the end, which is expected when a lane seemed to be failing and they push, its normal. Im referring to the people who will go out of their way, early game, and gang bang 1 person or get the majority of their team on one person in the lane or jng. I find these people at the end of game, just as toxic as the chemicals that cause cancer. In the end game, they defend their "skill" by saying my team sucked, or I sucked. It gets on my nerves (and im not crying about it, i do get aggravated with the shit they say, but i get over it, like a normal person) when at least 3 of the gangbangers go on the end game chat and like to put on this act that they could beat any one and that they are big and bad, and wanna start something after. These are the people who will get their whole team to chase one person through the jng, just to get that 1 kill and for the other 4 to get the assist. Personally, i have encountered this toxic "strategy" many times, and the same type of people, will use it. Its used (early game) by people who know they cant 1 v 1 and are scared to see their name up next to the word "slain", so they get the 3 stooges to come and get that one mid lane early game, then wanna act like they accomplished something in the chat and act superior. I then end up flaming the chat, i can say some pretty mean things, i wont lie, i never said i was nice, ill be nice in chat if im given it, and i wont give it to ppl who enter saying "u suck, u cant build, stop playing (champ), ur weak we didnt 5 v 1, u cant do wtf ever they say, it is toxic and thats the point, their ego makes them believe they are somthing, God knows they arent. This kind of superiority, is what shortens my fuse and i end flaming in end chat, and exposing them for the weakness, i personally (from where i was born) believe, you should fight your own fight, and if you need friends to help with one person fight, your a weak individual, and will become a weak link by ur self. They always leave ur gang banged body with a thumbs up like its a "mission completed". Wrap it up, if u cant 1 v 1 at lvl 41 or wtf ever level, just learn how, pretty sure u can be self reliant and learn to fight one person in a lane by ur self and not look like a weak gang banger. its a team strategy, not a team gang bang other players. If ur a jump a hoe, make that ur Username so ppl know and can prepare for the anal they will take from ur team. V. (ex)