You are assuming default behavior for spoiler tags. There are actualy several options that affect how spolier tags are rendered: "(default)", link, div, span, table, and reveal. The table view just puts dark text over a black background (in a table). The code is not collapsed or linked to in table view. That makes spoiler tags entirely inappropriate for large bodies of code, especially in root nodes. This seems like a classic example of misuing a feature without understanding the consequences. The readmore tag was designed to deal with large bodies of code and that is what should be used.