The arcade is being redesigned by Tom at the moment.
The new design should have more categories, one of which will/should be a "laboratory" where examples/tests/first time uploads should be put, imo, without ratings as it is more a ground for experiment/learning where comments are more valuable than a "X stars rating".
What could be done once the design is up, if users try a game that falls into the lab category but was uploaded somewhere else, rather flag/report to mods so that we can move it rather than "destroying it".
IMO, not everybody knows or can afford hosting and despite what's been told in this topic, having a game uploaded online (in the arcade) when you're a complete beginner is a first step in learning game making. Even if it is in a "misc" category with no ratings.