We're told the threats began to come in last week, after Bristol and Mark made the finals. Execs on the show told Mark to stop tweeting because it was inciting people. Mark complied.
Sources connected with the show tell us extra security will be on hand tonight for the show. And, if Bristol and Mark head to New York, execs are talking about breaking format and not doing their interview outside in Times Square -- but rather in the studio, where it's more secure.