It could get them kicked off Tapas, because encouraging people to pirate Tapas content could actually get any of us kicked off Tapas. We all signed up to the following clause in the site T&Cs:
"Users, who violate these Terms of Service, tamper with the operation of any program, or engage in any conduct that is detrimental or unfair to Tapas Media, the program or any other users (in each case as determined by Tapas Media's sole discretion) are subject to suspension or cancellation of their user account(s) along with their ability to submit requests for payment."
Tapas would be completely within their rights to suspend the user's account. It might not be a good idea though, since it'd potentially cause the Streisand Effect and make whole incident to blow up, drawing more attention to a post that will likely otherwise just blow over.
I doubt it'll get them in bigger legal trouble...unless the post is misrepresenting the truth in some way in which case... libel would be a possibility. It could be bad for their career though even without legal complications, if they want more writing work in the future and searching them online brings up all this contract drama where they admit to not having read the contract properly but then complain about it and encourage piracy.