Why Sirius did not apparate into GH

[Dana]

No: HPFGUIDX 164179

I do not know if this has ever been suggested before so if it was than 
sorry for bringing it up again. 

I have seen in the archives (yes, yet again) that many wondered why 
Sirius used an enchanted motorcycle to go to GH instead of apparating 
or even why he did not use this in POA. I think the answer is rather 
simple. Apparations are monitored by the MOM and in VWI it was 
believed that LV had spies in the MOM, so it would not have been wise 
to use this way of transportation to visit James and Lily even if the 
location it self was protected by the Charm, it would still give a lot 
away about the location itself. Of course this is why he could not use 
it in POA they would have tracked him down. When Sirius went to see 
the Potters after not finding Peter at his hiding location, he did not 
know anything had happened to them so it would still be stupid to just 
apparate to the location because if there were okay than he would have 
jeopardized the safety of everyone visiting the Potters not just 
theirs, only after he saw what happened did he not need it anymore. 
Just my simplistic theory of course. 

Dana