Arguing with my dad is profoundly unpleasant, and he is extremely stubborn. I may send him links to websites, especially if I need his cooperation to involve my sister because she's 16, but I don't anticipate a good result from continuing to engage him directly (at least if I'm the one doing it: our relationship history is such that the odds of me convincing him of anything he's presently strongly against approach nil, and prolonged attempts to do so end in tears.)