I was about to post the following entry in WP:ANI

 Harassment by user  

I have been constantly harassed and offended by the user , and I would like to know what measures can be taken against this kind of behaviours. I am involved in an ongoing discussion over the article Copacabana with this user, but it seems that his actions have extrapolated as of recently, and he embarked in a crazy campaign of difamation and verbal abuse in several pages, including my own:
'Defamatory and slanderous accusation made by Rsazevedo against Hu12
'Rsazevedo offended and ridiculed me
'Defamatory and slanderous accusation made by Rsazevedo against Hu12
'Defamatory and slanderous accusation made by Rsazevedo against Hu12
'Defamatory and slanderous accusation made by Rsazevedo against Hu12
'Rsazevedo offended and ridiculed me

I appreciate any help in solving this problem, which is quite annoying to me. I am shocked and saddened to discover such childish behaviour in Wikipedia.