I've been thinking about this recently. To declutter the Wiki without removing any content, I've now moved all Glitches and Game Errors to a page dedicated to that specific level.
By all means, feel free to keep adding to the main Glitch pages. But if there's a glitch you know about - no matter how minor, feel free to add it to that level's respective glitch page too. Even if I've removed it before for being too minor (which really was just to keep the pages looking tidy).