Places of significant importance in the wizarding community (whether because of magical properly or deemed significant by society) are hidden from Muggles. For example: disguising Hogwarts as a ruined castle, Diagon Alley only being accessible by Floo power, Apparation or the hidden entrance to the Leaky Cauldron.
We see that the Ministry takes action against underage magicians practicing magic outside school, such as when Harry blows up his aunt or uses a Patronus. But later in the series, we see wand firefights on broomsticks taking place on busy streets, in full view of Muggles.
How does the wizarding community handling the cover ups of public magical incidents in the Muggle community (from small ones like Harry's aunt blowing up to large scale wand firefights) which could be reported on the news?
Also, in the off chance that the Harry Potter series also took place during the advent of the smart/camera phone, is there any reference to how phones may have affected these cover ups or how the process was adapted to deal with advancing muggle technology?