What does a delete button do? If it's relevant for 313 in X's eyes, I'm sure there's a Y who agrees. Generally there is also a Z who disagrees. I assume Z has the aforementioned delete button. Quality comes from the members of the list. Have a little trust that they know what they are on about and are able to interpret the mission statement. After all, Z might think a thread about disco is irrelevant. Perhaps they haven't been listening to Theo Parrish. Y thinks the whole Downwards/Surgeon techno thread is irrelevant. Perhaps they haven't been listening to Claude Young. X might think it's all of interest, anyway.
If Y appreciates that Z might just know what's relevant to 313 in Z's eyes (and vice versa), then they might learn a little. Folk should chill out a bit and have more faith. Jonny.