I mean, it feels a bit creepy seeing him post that he's just watching something on tv, and being able to hear it through the terrace house walls. OTOH, he lives his whole life in public and I'm at the start of what I imagine will be a short-lived twitter addiction.
We're not particularly close, have a friendly few words while putting out the recycling, take in packages for each other, but nothing more.
And should I tell him I'm following? Bring up a tweet in passing? Tell him my twitter ID so he follow my own banal posts about what I'm making for dinner?