I'd like to suggest adding the use of Subdatasheets to the list.

Today, in researching another problem, I discovered that Access automatically adds a Subdatasheet to a table when you create a Global Relationship.

While Richard recommends that you do not want to allow users to directly use the tables this can still "cause your database to slow over time".
I have not yet found a setting to shut off the automatic creation of Subdatasheets.  There are ways to remove them however.

1.  Click on properties when your table is in design mode.  Change the setting of Subdatasheet to [NONE]

2. Don't use the Global Relationships ( Database Tools -> Relationships ) to map out you relationships.

3. Manually remove the Subdatasheet.
   In Datasheet view, open the table or query that contains
   the Subdatasheet that you want to modify.

   On the Home tab in the Records menu, click More, point to
   Subdatasheet, and then click Remove.


Source article:  Microsoft.com