From what I can see, they're just reminding people that bitcoin is 'not legal tender' in Taiwan just like everywhere. Now whether this implies illegality, or a ban, depends on where you live I suppose but I doubt they'll be shutting down any Taiwanese exchanges.Headlines like this have the potential to scare away investors, though.
Taiwan government at the moment is continue assessing bitcoin if they will legalize it or not but for sure they have already declared to support the ICO as they will follow the footstep of Japan in handling their bitcoin and ICO but with full regulation to ensure that it will not be used in illegal activities. So therefore these events are showing signs of possible legality of bitcoin and other digital currencies of the nation.