When you start to give your Social Network a more custom look, its can be nice to remove the username from the members home page “Hi Username”
To do this simple modifications just follow the simple instructions below.
1- Go to your SE admin then Language manager / edit phrases (in English)
2- Search for this: Hi %1$s!
3- Remove the whole phrase and leave the translation bar for Hi %1$s! blank.
4- Save changes.
Note: If you wish to only see user name then simply remove the Hi and the exclamation mark ( ! ) from %1$s! and save changes