I segregate some activity across different Google accounts. By using different browser makes (Chrome versus Firefox versus...). And/or by using different data

I segregate some activity across different Google accounts. By using different browser makes (Chrome versus Firefox versus...). And/or by using different data profiles in those browsers (not just the "change user" feature of the Google web properties, but a completely different browser profile subdirectory). My oldest and most-used Google account (formerly known as a Gmail account), I refuse to Google+ify, as long as I can. For reasons like the OP situation and others. A while back, I needed to use Hangouts. I +ified another Gmail account that I used for a subset of general business contact. If/when it is borked, I can walk away from it. And it doesn't contain data I worry overly about "bleeding".