I live in Indiana and haven’t heard a thing about it.
Well, here you go then:
"The unsavory Trump fans in question appear to be multiplying: Something similar is already afoot in Indiana, which hasn’t even voted yet. Kyle Babcock, an at-large delegate selected at one of this weekend’s nine congressional-district conventions, made the mistake of explaining to the Indianapolis Star that he would not back Trump, because he believes Cruz stands a better chance against Hillary Clinton in November. For his trouble, Babcock received e-mails such as this one: “Wrong side Kyle. Hope the families [sic] well. Your name and info was sent to me on a list that is going public. Think before you take a step down the wrong path, the American people want to have faith in your [sic] but it looks like a future in hiding is more appealing.” The same person sent a similar note to Thomas John, chairman of the Republican party in Indiana’s seventh congressional district."