Hello back again Jackie! I saw that news item too. No, we would not jeopardize rescuers' lifes like that. Tours and marathons are under strict observence of ice masters. When there is risk of bad conditions no trips/contests are organized.
That's why, JavanLuke , the great quadruple marathon did not happen this year.
The ice did not get strong enough to support a few hundred prof marathon riders and 16.000 tour riders.
( tour riders have from 6 AM till 12 midnight to complete the distance) Very sad it did not come round.