Probably not. It would be an exceptional deviation from existing understanding of the First Amendment, to put it lightly. The cases where blocking speech is per

Probably not. It would be an exceptional deviation from existing understanding of the First Amendment, to put it lightly. The cases where blocking speech is permitted in the US involve distributing material that is illegal to possess or distribute (stuff distributed in violation of copyright, for instance). In the case of Uber, what might be illegal is purchasing service from them (or them selling it to you). Them telling you about their service, even if it's illegal in your jurisdiction, is protected speech. Cannabis is currently illegal to possess or purchase in my state (although not for long). It's still legal for me to read High Times or websites selling commercial products that are legal in Colorado. It'd be illegal for me to place an order. (And if it's permitted under the proposed regulatory environment, it's probably permitted now, too.)