Having been a constant lurker at one time, I can sort of understand people who don't like to post anything, even if its not particularly private.
At the same time, because of how social media works, lurkers are often a lot more obvious in these environments due to people making empty accounts to follow others. So it's not pure lurking, because the person being observed knows you are there, which may creep them out.
At the same time, because of how social media works, lurkers are often a lot more obvious in these environments due to people making empty accounts to follow others. So it's not pure lurking, because the person being observed knows you are there, which may creep them out.