Using auto-blocking is recommended in cases where you believe there is a rogue access point in your infrastructure. If you identify a rogue AP, it is recommended that you locate it and fear the appropriate measures.
As informed by @GreenMan, It consumes Airtime too.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.