It's not "treading the edge," it's outright admin abuse. "Melee only in the water" isn't a rule, and neither is "no shooting grenades through the hole in Pipeline 2 before round start." The rules for the server are discussed here and made here, in this thread, and we've never considered those issues or discussed making rules about them (and we don't need to).
I don't think anyone that doesn't post in this thread to discuss issues should get Admin powers. I don't care if you idle in #ocrtf2, you need to be posting here, on this forum, in this thread.
And come on, don't kick people off the server because they're dominating you. That's childish. Admin actions should always be taken for the good of the server (banning griefers, abusive micspammers, etc.), not for personal reasons (getting dominated, not conforming to your made up, undiscussed house rules, etc.).