blocking fields

Many sites now require that in order to enter the site it is necessary to copy a graphic image of a text string into the logon form. This is not necessarily a problem for IV because by not selecting autmatic logon it is posible to enter the graphic and then click to submit the form. However IV creates a new card in this case and that is an interference because the graphic changes with each entry resulting in a long list of invalid cards which must be deleted. Moreover many forms also contain various other fields that are identified by IV but are not intended to be part of the card. There needs to be a way of telling IV not to collect data from fields which are not meant to be part of the card.

Is there a solution?