To be honest, I have never heard about use of downvoting power as being mandatory. Unless it was a project that got delegation for it from stinc to fight abuse like spaminator or steemcleaners.

It would be surprise for me if such requirement was requested by anyone on Hive. If there is someone who is trying to force you to downvote, please let me know. This is unacceptable.
If you don't want to mention publically, you can find me in Discord.