MongoDB proxying

Hello MongoDB forums,

We are looking to put a proxy in front of our Mongo cluster, similar to PGbouncer. Our goal is to inspect queries, and reject them if conditions are met, such as a remove with no predicate.

It looks like this project might do the trick:

Has anyone used it at scale? Are there any gotchas? Are there good alternatives or Mongo native tooling I might not be aware of?

Thanks in advance for any assistance anyone can provide,
Joseph Hammerman