Promoting it is, yes. The data is pretty clear; promoting abstinence increases the spread of STD's and pregnancy.
Promoting abstinence is a bad thing? The only reason you think that correlates to the spread of STD's and pregnancy is because people don't like to be told what to do and do it as result of short-sightedness and rebellion.
Not promoting abstinence is letting people take a chance. How is one to know if their partner has an STD?