How safe is a FoxPro system (desktop) that uses an SQL database at a remote site through ODBC over the Internet?

Can data be intercepted and easily read by unauthorized people?

I know the truth is that there I so much data going over the Internet that there is safety just in the fact that no one would bother to try to trap MY data. However Clients always think that some criminal will spend thousands of dollars to find out who my Client sold their last case of toilet paper to. NOT Likely, but possible.

How safe is SQL data?