Default "save to online profile" toggle to off.

When using fill and sign, I need several different people to sign attendance documents. In the signature block, there is a toggle to "save to online profile." How do I set that toggle to default to the off position (I am using iPad and iPhone)? It is a pain to have to remind everyone to turn that off before they sign, and most don't, so I have a ton of unwanted signatures on my online profile. I need this setting to remain off. 

Thank you.