There are many things about these parents that lead me to believe that they are not doing everything possible (in fact doing very little) to find their daughter. Turning away Mr. Abeyta and Ms. Porter is not one of them.
I have much respect for those who have lost children and want to assist other families. But, some of those families may be directly responsible for the loss of their children. Others may be completely innocent and simply not want or need the assistance offered by Mr. Abeyta, Ms. Porter, or anyone else. I don't like it when folks start foundations because they are victims, and then behave as though other families that they consider "victims" don't respond to them as they wish. I really don't like that these folks who established foundations to help other victims feel qualified to tell us who is making decisions for the parents and profess to know their psychological and emotional profiles, going so far as to predict (quite passionately) possible suicide of one of the Lisa's parents on national tv (after having spent literally only minutes of time with the parents in a room crowded with others). Their motives may be good and I deeply sympathize with them for their personal losses, but they should simply extend an offer of help/support. If it is ignored or refused, stay home or make an offer again later, imo. In the meantime, there are other families with lower profile cases that may really need and want help. I applaud Mr. Abeyta and Ms. Porter for assisting those who are receptive to their assistance.
ALL JMO...