The library thing is bad enough in the way it is stated to have taken place. (Hypothetical? loyalty test? give me a fucking break.)
This doesn't address how Palin explains not taking food groceries out of a local sales tax she wanted to hike, or her attitudes on sex ed or funding for pregnant teens (which are certainly fair targets. You can target her policies without going tabloid on her personal life).
This site also debunks some tarring of Obama.