[p_ing]

You put yourself behind a login. If that's intentional, ok. Otherwise, you've isolated yourself from an audience.

You may end up on /r/LinkedInLunatics/. If you believe all publicity is good publicity, that's a good thing.

Your brand is no longer your brand. You're just another poster. May as well have found some default subreddit to post on buried four levels deep in the comments.

[Juliate]

Adding to this.

You may grow your brand in a specific subset of LinkedIn users (not the ones outside of it though), but you may also damage your brand in a specific subset of LinkedIn users.

And yes, your brand is no longer your brand, it's LinkedIn's now.