Ask HN: Is spamming people with Open Graph actions allowed on Facebook?

When you enter the site "Are you over 13? This photo may not be suitable for children" warning shows up & prompted you to log into the site with your Facebook account.

When you log in, they start spamming your timeline with - I think - the weirdest action ever ("laughed") since you already gave the publishing right when you were logging in. The page also get locked pretty soon, and requires you to like their Facebook page to go back.

I'm kinda surprised to see that Facebook is allowing such an infraction. Is this really allowed?

Here's the URL if you want to check out by yourself: http://humorhub.org/