The most upvoted answer here appears to be quite dangerous advice. Exposing your wallet seed to an online tool might lead to all sorts of trouble, no?
What to do in cases like this? Comment/downvote/flag/meta post?
I would suggest editting the post with a large warning before the dangerous part, explaining the risk involved. If there is a large concern of safety and there is a safer alternative, I would also downvote the answer, and upvote the safer option. If the answer is outright and obviously destructive, you could flag it for deletion.