Are you are involved with recruiting in any way? Then be the change you want to see in the world. Does the company you work for use LinkedIn or use recruiters that send messages of LinkedIn? Make an effort to stop hiring them, and use neutral tools like email.

I dislike LinkedIn, but have seen very few people walk the walk professionally when it comes to influencing their own workplace to stop using it in some way. I have advised every company I have worked at against using external recruiters, and rarely has it been accepted (even though we always got a lot of candidates from the external recruiters who weren't a good fit with regards to either skills or eagerness).

Props to the article author for actually doing so, and I hope they will remember this and not use LinkedIn when the company they are cofounding has to recruit their N > 20th employee.