In the past being an "internet person" brought you into interesting sub-cultures. You had shibboleths (like quoting bash.org) that would identify you. Since the internet was small you would meet genuine often interesting people. I still have friends from the "wild west" days of the internet. The time period, I think, was the absolute best time to be alive and on the internet (though terminally online lamers and cry bullies demanding censorship may disagree).

Now, the apt term for people who are "too online" is "terminally online". The terminally online are more like a cancer than an interesting sub-culture. Since social media has allowed them to gain some semblance of following in a hyper-niche subgroup they think they can take their absurd opinions, styles, ideas, etc into the real world and expect it to work. These people are easily identified. When placed in an uncomfortable situation they become cry bullies. You might know many of them as your current HR department.