KCB Peoples Review: Whats your Take on This?

Presidential candidates have signed an accord to prevent electoral violence before, during and after February 14 elections.
President Goodluck Jonathan also identified threats and provocative statements by leaders of political parties as reasons why their followers take to violence.
Do you think signing an agreement is enough to guard against violence? What should these candidates tell their supporters to ensure they desist from violence, irrespective of the outcome of the elections? Finally, do you think a punishment should be prescribed for erring politicians and parties?