It's quite obvious what Brexiters would have done after the opposite result of June 23rd. Having spent a great portion of the last year, if not in some cases their entire adult lives, fuming either at the decision to join the EC in the first place or fuming at what it became after the Maastricht and/or Lisbon Treaties, and passionate about rescuing the UK from its position of virtual slavery or subservience at the hands of the evil EUSSR and its Stalinesque overlords, would have shrugged their shoulders, gone "oh well, guess it's fine for the UK after all to stay in the EU, hurray for common policy objectives!" and never cared again.