I think that it would be great to add a little informative text to the end user's interface, like done in the configuration area.
Instead of an empty
Database Settings
Table Prefix
better say
Generate Random Database Prefix for users If checked then a randomly generated Database Prefix will be made during an installation.
This would prevent headaches and funny situations when you search for tables in the database and you don't find what you want even with a gun pointing your head, lol