You must place a header before your title to indicate and your purpose and, if possible, the system being used.
Example: [WorldBuilding][D&D 5e] Need help figuring out what Dwarves eat for breakfast.
I think something that you should start on so this doesn't devolve into just memes and comics is to require headers for posts. Such as: [Meme], [Worldbuilding], [Encounter], [Discussion], etc.
In my experience, forums that start out with these kind of rules tend to flourish because the user is able to sift through everything they are interested in with ease. That way you don't have people incessantly complaining about low quality content.
You make a really valid argument. I'll implement it asap.