So there are no rules you can pick out that have been or could easily be subject to abuse?
Interesting...
If you insist, here are the biggest ones
harassment: self-explanatory...a mod claims 'he/she is harassing her/him/me'
derailing, as above, a mod claims 'he/she is derailing the thread'
ban evasion (how can you even enforce this without an IP checker I will never fathom)
incoherent/contentless posts....again, the mods are the arbiter of what is or is not content, and can use this power as they see fit
A mod can choose, on a 'case-by-case' basis, to enforce these rules...and they do: on the same people over and over....look at the banlist....while certain other posters do the same things and nothing ever, ever happens to them, not even a warning.
Funny how the posters who are always infracted for this stuff are the ones that staff here find annoying or don't get along with.