Why would Dennis try to avoid Alonso getting another team in 2018?

Among the several reasons why Button leaves the pilot, the leak of information has been one of them. What will Dennis do if Alonso is presented with an opportunity in the future?

Ron Dennis justified these days one of the key reasons to keep Button at McLaren with his «creative» solution: to avoid information leakage to other teams after two years of working with Honda. What would have meant for Williams or Renault, for example, that Button took specific details and the Japanese manufacturer’s roadmap? If this was the stance with the British driver, how would Ron Dennis with Alonso acted if the Spaniard had other options in 2017 if he decides to remain active?

«We wanted him to be totally involved in everything we are developing, so we needed to close the opportunity for all that data to go to another team.» According to El Confidencial, Jenson Button’s new contract to remain linked to McLaren is very lucrative, to the point that he does not stray too far from the figures he charges as an active driver.

Ron Dennis justified these days one of the key reasons to keep Button at McLaren with his «creative» solution: to avoid information leakage to other teams after two years of working with Honda. What would have meant for Williams or Renault, for example, that Button took specific details and the Japanese manufacturer’s roadmap? If this was the stance with the British driver, how would Ron Dennis with Alonso acted if the Spaniard had other options in 2017 if he decides to remain active?

Source.F1