What are the disadvantages of using the elements that Web 2.0 covers?

-Viruses can be found

-Some loading take too long to process 

-Info cannot be made private

 -Disagreements or arguments may occur

 -Unpleasant comments or opinions may occur

-Blogs and information are limited

 -Security forms need to be filled and sent to the manager of the network being using in Web 2.0