Why wouldn't it be? Unless you're trying to flag stuff a year after it's been posted, I would expect at least that a posted link would be accessible to read.

Unless what you mean is "inaccessible" in the sense of "not accessible to people with disabilities," in which case, good luck flagging a large percent of everything that gets posted. :/

Unfortunately, links often go to paywalled content. They each waste my time and make HN worse.