This is what my neighbour does too. It really eases the tension and the flock think it feels right.I will put mine in at night so they wake up together the first morning. I don't like to force it at dusk. The worst of the roost time pecking occurs after they have rooster and before it gets dark. It can be vicious.
I find that but having them wake up together this is lessened. It does not however go away.