Sercurity And Dtproperties

I recently Aquired a SQL 2005 standard x64 edition, I attached a table from sql 2000, there is a system table in this database called dtproperties and it has a public role. Now, I setup a limited user and that user can see this table and query it, etc. I removed this table from the public role so this user does not have access to it.

My questions are,
how does removing the public role from dtproperties affect users?

if it has to be public role, then does it need to insert, update, or delete?

if it does need insert update or delete, what happens if a user does delete insert etc.


I guess looking for an all around answer to why public on dtproperties


Tdar