I should have probably stated this sooner, but to make it explicitly clear, the term “private message” in no way garauntees privacy. Admins can see everything written within this web application. A more fitting term would be “Personal Message”
While nobody here is actively searching through the PMs of users, users deserve to know that admins 100% have that power.
This might seem obvious to many, but in case it isn’t, it has now been stated for posterity