multiple abductees

why do claimed multiple abductees/contactees like jim sparks and alex collier not just put up 24 seven cameras in there homes. if they are trying to spread the word about ufos and aliens and they claim to be visited on a regular basis is this not a surefire way to produce proof. I mean it seems so obvious that i dont understand why they have not already done this unless there not on the level. If anyone has any contact with multiple abductees tell them to do this.