so SNMP support you could add if you were using the Net-SNMP libraries. You would need to interface into Wowza via a custom Net-SNMP plugin but this is very do-able. It would slow things down, but very possible.
Other options directly into Wowza are more push like protocols such as IPDR etc.
 I do have the beginnings of an IPDR client as I have written IPDR server code previously, but not yet fininshed[/edit]
Blocking a user from changing the name of the stream you can do now with a custom module
Detecting a frozen stream, so a source, you can do now with a custom module checking timecodes on stream packets
Detecting an interrupted stream, same as a frozen stream, but now checking if timecodes have been reset
Detecting a missing stream, again possible by checking if the stream is published.