A senior researcher at the Citizen Lab of the University of Toronto, John Scott-Railton, has warned that there are some features of Starlink that make it different from other comparable technologies that were previously used for this purpose. Moreover, as he told Business Insider, these terminals also have a distinctive appearance, which is not something you want from such a device.
Other security experts warn that radio signals from such antennae could be tracked down by any modern military force, so deploying and using them is a risky business. Not having the ability to communicate with the outside world is just as dangerous, some might argue, though, so that also has to be accounted for.
If you think about it, without Starlink, the Ukrainians would be left without any contact with the outside world, which is an undesirable situation in this context.
Because of the distinctive look of the antennae used by Starlink terminals, such dishes could be observed from the air by Russian forces using various tools, from drones to aircraft. However, the signal itself could make the position of each antenna a target for missiles that can home in on such signals.
In the latter case, the Russian military would have to have and also to deploy specific missiles that would bring the described effect. Until then, Ukrainians are advised to use caution when communicating with the use of Starlink terminals.