There are certainly configuration issues to be resolved with Mode S.
Here "Down Under" we see issues such as aircraft imported from the USA retaining their old American Mode S Address (not updated to the Australian allocation), interpreting the binary address as the Hexidecimal code - I have seen numerous Mode S hex addresses as 0111111 - Aus allocations are with 7Cxxxx (not sure what the LAME did with the other 18 characters!) or setting the rego as the hex address (typically for ultralights).
Education is the key!