I think you can still watch the entire Babylon 5 series for free on go90.com . US region locked.
Why are they still bothering with that? Region locking is pointless...
They, like many others, are contractually obligated to provide protection for the publication rights they have gained. They must, in order to be able to continue to broadcast the media, actively enforce the publication rights and terms.
Why is it so easy to just find a proxy to use to watch region-locked programming? Because, they're only going to go so far. If they wanted to, they could actively block most known public proxy servers and many commercial proxy address blocks. Sure, some legit customers could get caught up in that, but it'd be a small portion of the total, so it's manageable. But, they're only going to go so far in complying with their contractual obligations... just far enough to be able to prove it in court.
This... I might actually try to watch this:
I just hope they don't hump a football with it and introduce too much crap. I'd like it to be something like "Vikings", with a lot of it based on history, with a fictional flare. That's my hope, anyway, and I don't really know why I'm hoping the History Channel won't hump a football... I bet they'll put aliens in it. Aliens... in armor. Yeah, they'd do that.