True, but there are other ways to go about it. Rather than trying to challenge someone's setup, which (I assume, apologies if incorrectly) you aren't familiar with, you can start by asking them about the setup and how they keep it independent from GH. Let them expose either the success of the endeavor or its shortcomings. Such an approach is a constructive one, whereas trying to challenge someone is an antagonistic approach. We're all in this together, so let's keep our discussions constructive, and focus on learning from each other rather than try to tear each other down.