Hi,
I completely agree with Jyothi on this. One thing you should decide is whether to take a 'Compliance based approach' to this issue or a 'Value based approach'. Compliance based approach which emphasises on punishments for non-compliance, will reduce such activities, but only on the short term. Being youngsters they can feel offended which will reflect on their productivity.
Value based approach is what Jyothi explained. Explain the team about the values of the company and describe them that till they are with the company they should try to adhere their values to the company's values. Training on mail etiquittes, behaviour in office with peers, might be of great help to these youngsters for their future and will work for longer-term.
Regards
Saravana:icon1: