I've been on this stack for a little while and we do not give legal advice (at least based on community consensus). I have seen many questions closed, or severely down-voted because the question they ask is basically regarding legal advice. I am thinking that part of it may be because these tags exist. It almost appears as though legal question would be on topic because we have tags for them.
I also found this previous post on meta where it says [legal] has already been tagged to be removed (roughly 6 years ago). It also says if the [legal] tag reappears we should blacklist it
There was another meta post as well where some people were saying almost all of the questions tagged with [law] were closed as off topic.
I am not saying any question that even refers to the law should be closed, I just that maybe we should burninate these tags because if the question is focusing on the legal system, it will more than likely be close. This is very misleading for anyone new to the stack.
There are only 225 question using [legal] or [law] and at a quick glance, they all seem to have other tags on them. So burninating these tags will not leave many (if any) questions tagless.