If you do it that way, then'd it be better to have a flag for "include" as opposed to "exclude"

<INPUT TYPE="hidden" NAME="include" VALUE="Yes">

Or you could do 1 for exclude and then leave the value blank to find all of the recs that don't have a 1 (provided there is no other value in that field - meaning its either 1 or null)

<INPUT TYPE="hidden" NAME="exclude" VALUE="">