Are you seriously accusing Serbia of starting WWI? No serious historian believes this to be true. Sure, Gavrilo provided the spark by killing the Archduke, but it's a bit absurd to put the real culpability on Serbia as a state. Serbia fully tried to cooperate with Austria in investigating the crime and even the Austrian officials admitted they had no real casus belli. The truth is that Germany and AH were already set on declaring war and that is exactly what they did.

The bottom line is when was the last time Bosnia declared war on Serbia?

By that logic when was the last time Serbia declared war on Bosnia? The Bosnian war was primarily a civil war and the likes of Izetbegović and Tuđman were as guilty as Karadžić and Milošević.

When was the last time Albania declared war on Serbia?

Again, when did Serbia declare war on Albania? If you are talking about the KLA terrorists, then they declared war when they started attacking Serbian police officers and soldiers with guns and bombs.