> There are some cases where legitimate cell towers will be moved to deal with a temporary increase in demand, like a sporting event, but this is relatively uncommon.<p>My understanding is these are quite commonly used for concerts, sporting events etc., Vodafone called them COWS (Cell site on wheels).<p>Anecdotally when the Vodafone CEO of the time came to visit NZ, some lackeys were charged with staying physically close behind him with a COW so he would always see good reception.