I would love to use HelloFax, but most things that I actually need to sign these days are, almost by definition, sensitive or confidential. E.g.: Investor agre

I would love to use HelloFax, but most things that I actually need to sign these days are, almost by definition, sensitive or confidential. E.g.: Investor agreements, stock plans, contracts, etc. Would anyone else feel uncomfortable about handing over copies of all this to a startup?