I think it's best not to interact with them since they're just going to keep shouting about how bad everyone else is and how they were the only ones doing anything, while really doing nothing, which continues to be established further.
Even going off like "Who gives a damn about forum that looks like something straight from 2008, doesn't work half of the time and gets spammed by chat bots every day?", which is really funny because apparently THEY give enough of a damn to keep coming back here every day. And not to add to the conversation or have a good chat, but just to shut people down.
