Possible to implement ratelimiting

I have an urgent need to have a rate limited ipfs node.. perhaps implementing something like this https://github.com/juju/ratelimit within IPFS

Would it be possible to have a user configurable option in ipfs to enact this rate limit logic, if not activated carry on as it currently does?

Can one of the devs provide an estimate on how hard this would be to implement (Time/Cost)? Perhaps I can organise a bounty for it to get it bumped up the priority list :)

Much appreciated.