i think you two are arguing over a minute aspect of this. whether or not you complete or fold with total crap from your sb is really not very important to heads up imo. i tend to come from dale's point of view, where mostly everyone online i play heads up is very passive, but if i run into a really aggro person i'd have to change.

heads up more comes down to doing what is necessary to confuse the other person such that they will fold to you more often than not, but still think you're constantly bullshitting them, until your stack edge is so great, or you get goods cards, that you can get them ai.