As the article explains, the concern is that they violated a law originally designed to prevent malicious "hacking" and that carries penalties that may be stronger than are warranted for something that's a lot closer to trespassing.
I don't think you are trespassing anybody's property by accessing a publicly available website.
It's more analogous to having something on your property you want everybody walking by the street to see. Then you put a tarp to block your annoying neighbor from viewing it but anyone else is still welcome to it.
Would the neighbor be trespassing every time he walks by the street and looks at it?
You're welcome until someone tells you otherwise. You can't legally go back in just because you changed your shirt and put on a hat.