What you deem petty was violation enough and against ToS to get you warned. GM's don't draw your name out of fish bowl and decide to flag your account whether right or wrong without legitimate reason. They have their own policy they must go by too. They violate those and they're out of a job.

I certainly don't think players line up to report others for funsies. Maybe a small few do, but not this vast population of players that violators like to think there is. It takes a bit of effort and time to fill in a report and attach any files relevant to the report, then send it in. Such a waste of a day, unless their is good cause.