Solved
block leads/contacts from Marketo
i need to block about 15000 contacts that are in salesforce from synching to marketo (don't want to pay for them). so i was going to add them to a SFDCcampaign called "dont' synch' and then delete the records in marketo only then in mareketo write a smart campaign that says if memeber of SFDC campaign "don't synch" don't synch to marketo
can this be done and will it work?