[abdullahkhalids]

If you create an open club for your hobby in real life, you will also get weirdos joining your group. These people will commit minor offenses like disturb others and serious offenses like sexually harass someone. A club that includes teens will, with non-zero probability, share porn with each other, or even "inappropriate" pictures/videos of their peers - the latter of which is a very serious crime.

You can avoid this in both real life and or the internet by making very closed clubs in which only very trusted people are added.