Fight them? They're illegal in Wisconsin, so let's keep them that way. They should be illegal everywhere in my opinion. Write to your representatives, speak out against them in the papers, do whatever you can to keep the law from changing.
If they do pass:
1) Drive sober, as you should anyway.
2) Learn where the checkpoints tend to be set up, and avoid them.
3) If stopped in one, show them your drivers license, say little more than "hello" and "goodbye", do not consent to a search.