I've read a number of posts about securing FB and reached the
conclusion that these are aimed at sysadmins and dbas of in house
managed databases who are able to restrict access to the FB database
file(s).

My situation does not fit this model. I have a freely downloadable FB
application, and I would like to think that the data, and more
particularly the data model implicit in my table and constraint
definitions, cannot be analysed or copied by competitors.

Are there any techniques or suggestions for securing FB when so
deployed?

Thanks, Andy.