In my personal opinion, that is not a valid answer. But unless we have clear community consensus on this, don't expect mods to actively delete them. But here are some tools you can use:
Close votes. If the question should be closed, then close it, the sooner the better. That at least stops more answers that may make it harder to reopen the question. Closing isn't bad and it isn't forever; it's a time-out while we address an issue. We want questions that can fit here to be fixed and reopened; we're not trying to pound them with a big red "no" stamp.
Not An Answer (NAA) flags. Not for the mods to handle (see above), but enough reviewers in the low-quality review queue can remove a post. Note: this only works if the community also visits the review queues on a regular basis. Go ahead; click that "review" link at the top of the page. Help curate the site.
Downvotes. Closed questions with no upvoted answers are automatically deleted after a while. But if you upvote those "go see a lawyer" or "ask HR" answers, you're (a) preventing the Roomba from acting and (b) rewarding that behavior. Most people will continue to do what gets rewarded.
Delete votes (20k for answers, 10k for closed questions).
Edits. Can you fix the question so that we can answer it? While in general the SE rule is to not edit questions in ways that invalidate existing answers, I personally think we should make exceptions in cases like that. That's not a mod pronouncement, but it doesn't need to be: the community can use votes and flags to address issues.
Questions that we clearly cannot answer help neither the site nor the asker. By all means, leave comments suggesting other places where the asker might get help; we want to help, within reason. But we shouldn't do that with answers like these.
For a while we were systematically reviewing our broken windows, with the goal of fixing what could be fixed and deleting questions that were helping nobody. The main organizer got busy with other things, but maybe we can revive this. It doesn't have to be run by a moderator, after all.