From the NYT:
In 2003, in Waller County, Tex., the district attorney wrote a column in a local newspaper threatening to prosecute students at Prairie View A&M, a historically black university, for illegal voting. The project sued, and the district attorney backed down.

In the 1970s, that same county required Prairie View students who wanted to register to fill out a questionnaire asking, among other things, whether they owned property in the county, had an automobile registered there or belonged to any church, club or organization unrelated to the college. A challenge to that practice led the Supreme Court to uphold students’ rights to vote at their college address.

In close states, these dirty tricks change the outcome of the election. It's the same for excessively negative campaigning to disgust voters to the extent they don't vote. Our voter turnout is a disgrace internationally. Yet it is university students and their peers who have the greatest stake in and hopes for our country's direction. Wherever you are, register within the legal deadline. In the last few elections, a national volunteer network of attorneys has been on call around election day to challenge disenfranchisement.

Also if you are in a state with electronic voting machines, it might be a good idea to vote absentee, on paper.

It would be so sad to go back to the days before the Voting Rights Act when black Americans in the South were prevented from voting by similar dirty tricks.