I've raised this idea in the past. A facebook group was started for this express purpose.

Now it seems an Ashkelon man has taken the first step.

Moshe Nissimpor of Ashkelon has decided that he has had enough. He built his own 200mm missile in his backyard and threatened to launch it into Gaza.

Unfortunately his next step was to take it to the Ashkelon Municipality building to show it off, rather than to launch it. Police seized the missile.

Personally I'm not convinced it was real.