* High quality comments tend to populate in high quality subjects. Anything related to social commentary/policy, mental health, general statistics, psychology, and such tend to produce very low quality comments. Some subjects really demonstrate Dunning-Kruger effect. For example there is a lot of passion around privacy and most of that passion, in the comments, seems to come from people most ignorant about privacy related policy/laws.
* When you read enough on here, given the size of population and rate of activity, you will notice shifts in behavior with regard to the trendiness of a subject.
* Don’t be afraid to be disagreeable so long as that disagreeability is limited to the subject of discussion and not the people discussing. Diverse opinions appear extremely welcome in high quality subjects but are shunned in low quality discussions that attract cult like followers, such as Julian Assange discussions.
* Be aware that not everybody will share your level of education and worldly experience. Comments/replies to that effect sometimes surprise me both positively and negatively.