The high profile activities came from the very beginning with an emphasis upon other missing children and preventing abductions. In fact, Gerry's four-day trip to the United States about 2 1/2 months after Madeleine disappeared, was entirely focused upon preventing abductions--not focusing upon the search for Maddie. I've quoted it before but here it is again:
"Mr. McCann has already met US attorney general Alberto Gonzales to discuss efforts to tackle child abduction.
The meetings are part of a visit to the US to learn about the work of specialist agencies in preventing child trafficking and sexual abuse."
http://www.thesun.co.uk/article/0,,2...340178,00.html
I think that the McCanns made a bargain with themselves and God, that they would work diligently and passionately for the welfare of other children. Madeleine's accidental death could be given meaning and other children would be safer.
There are other quotes from the McCanns where Kate talks about the "bigger picture" of other children being missing. She does this so early on with Madeleine's disappearance that it is quite unique. Yes, we all grieve in different ways, etc, etc, blah blah blah. That's why parents who lose a child so often end up divorced. This isn't a different way of grieving--this is at a speed that is again, unique.
My brother and his wife lost a newborn infant. A year later, they donated some furniture to the neonatal ICU for parents to have a place to sleep or rest. My friend who lost her son suddenly at 2 years old said she spent four years going to Compassionate Friends support group meetings before she continued for another 6 years to help others. No one I know who has lost a child is thinking about other people's children in the first three months--even the people who lost children to terminal illnesses such as leukemia. Six months was the earliest for people who knew their child was dying. Four years for one family whose daughter was abducted and missing, to even begin to accept that she might be dead, let alone start talking about other people's children.
It is inconsistent to talk about focusing only on the search for Madeleine and then make concerted efforts also to prevent child abductions.
So to me, no, the high profile activities don't necessarily mean they couldn't have been involved.