Hiding info about other users from normal users (e.g. `last` & `top` output)

Hi,

As the title says, generally, I would like to hide info about other users from normal users.

Currently, I would like to hide part of the output of the last & top commands about other users.

I made some searches on google and found some ideas, but all of them are above my level of knowledge.

I think this: http://www.nux.ro/archive/2012/02/Hide_other_users__processes_in_Linux.html

Will solve the top issue, and it's a general security improvement.

About the last command, I've seen a suggestion to add a wrapper script around that command to grep/ack the results.

Is there anything I can do?