It seems that 20k+ users can cast delete votes.

If it is anonymous and no explanation why, you can

• ask for clarifications in a comment and
• try to improve the answer without spending too much effort.

It seems that 20k+ users can cast delete votes on answer with a score of -1 or less.

If it is anonymous and no explanation why, you can

• ask for clarifications in a comment and
• try to improve the answer without spending too much effort.