Your joe blogger using somesmallwordpresshosting.com and you have a freeform comments page. People post 'private' comments of others. Who is responsible for w

Your joe blogger using somesmallwordpresshosting.com and you have a freeform comments page. People post 'private' comments of others. Who is responsible for what? How the fuck do you know if its of an 'EU citizen' if that isn't made obvious? Can you get fined literal millions because you fucked up some detail for your blog newsletter's email list?