No, back capping does not work if your team has 1/2 of a brain, collectively.

Enemy team sends three top, and one to your mid. Your team sends four top after capping mid.

Enemy team loses the 4v3 and windmill, your team leaves two players at Windmill and two to take back middle. Your duo at Windmill can defend the oncoming 3v2 because of tower.

Your team takes back middle and sends one more top to help defend windmill, while the remaining (highly mobile) player roams. They don't have to kill the backcapper, only poke to stop them from actually capping.

One person on each team is now tied up doing nothing, and your team has the advantage at Windmill because it's 3 vs. 3+Tower...

level 6 troll, ignore him. He probably just LOST a game to backcapping because nobody knows how to play at that level and is qqing.

You backdoor

on my way from fountain to windmill i take 3 seconds to drive you off, then proceed to help my team outnumber your team.

You return after i'm gone. My next ally coming out of fountain goes 3 seconds out of their way to drive you off and take back the tower. That ally then proceeds to the real game continuing to outnumber your allies.

As your team continues to complain that they are outnumbered you say "how are you outnumbered there is always someone stopping my backdoor."

gg

l2p

Plan #2:

Your whole team backdoors a point.

Our bottom caps your bottom cause you have no bottom.
The rest of our team caps all the other turrets you left undefended.
You wind up with the one tower you backdoored and as you take 5 people to the next one, my ally comes over and takes it back.

Your plan is the stupidest plan ever. I mean, you think our team can't see that all 5 of you are all in one place? It's easy to avoid you when you do that.