I don't think you would have a problem, since 25km is only about 15.53 miles.
Either way a lot of large metro areas already have limits on flying a drone in urban areas, either from federal or municiple laws. Unfortunatly because of stupid people and the fact that a lot of drone manufatures are from china, selling into a western market. You are going to get a lot of prememptive restrictions since the manufactures don't want to loose access to the market.
Over all I would rather take my drone for a trip to the country side to use it, then have them pass a law saying I can't have one.
Not to mention companies have been trying for decades to control how their products get used, with little success, hence the number of new laws to try and protect their failed schemes. i doubt anybody that wanted to couldnt make the drone do what ever they wanted despite the manufactures best efforts.