Splitting Hairs/Splitting Infinitves

Once again, I revisit the split infinitive. This headline says, "Daughter urges Okla. voters to not vote for father." The infinitive, which is to plus a verb, is to vote. There is a valid argument that there are times when avoiding a split infinitive is awkward. Writing the headline as follows makes as much sense and flows as smoothly: "Daughter urges Okla. voters not to vote for father." I can see no good reason to split this infinitive. There is security in these old rules. Cling to them. Cling to them.