Re: did they look at all for someone intending on causing mischief?
The FAA does have input on safe flying, and if it is true that use of C band 5G will cause problems for some planes (even if it is due to a poorly designed receiver on those planes) then the FAA should have the power to temporarily limit use of C band 5G where those problems may result.
The problematic planes should then have to update their equipment within a specified timeframe to address the issue, it can't be a permanent limitation unless the companies who paid for C band 5G frequencies are going to be refunded.