We are more connected than ever because of the internet, though you can also say we are less personally connected. Due to the anonymity of the internet and the safety it provides versus saying things in person, people have become less afraid to speak their mind and being offensive to others. You can compare it to driving a car. Some people tend to feel empowered when driving vehicles, though you know they would not act like this in person.
Regardless, you should always keep your trash talk on the internet and not meet up in real life to settle some beef. It is pointless and can only bring harm, rather it be physical harm or legal harm.