You can't really "make your own platform" though. Ultimately the ISPs could shut down access to any website they don't think their customers should have access to. The only recourse would be for the censored to somehow construct their own physical internet infrastructure, which was so difficult and costly the first time that it was highly subsidized by the government.
And do you honestly think you should have the right to determine what elections should be considered "harmful" enough to shut down others speech? There is a wide range of opinion short of the alt-right but in the same direction that could be shut down too, for instance apparently a majority of white people think there is racism against now (https://www.npr.org/2017/10/24/559604836/majority-of-white-a...). Do you think this opinion is so wrong that it should be silenced from the public forum? Do you think it would even be possible to do so?
And do you honestly think you should have the right to determine what elections should be considered "harmful" enough to shut down others speech? There is a wide range of opinion short of the alt-right but in the same direction that could be shut down too, for instance apparently a majority of white people think there is racism against now (https://www.npr.org/2017/10/24/559604836/majority-of-white-a...). Do you think this opinion is so wrong that it should be silenced from the public forum? Do you think it would even be possible to do so?