wait about 24-48 hours and if you don't get a response, just go aheaad and post it I'd say...
I would rather suggest him to wait for a response. If he is really willing to do something for his native speakers, he should not spoil it by breaking a rule and getting a negative impact for that. Patience mostly works better than doing things in hurry.
You have to learn something here. A lot of the time when you send a pm to hilariousandco or another mod and they ignore it, it means it's not worth their time to reply to it so they are simply satisfied with what you have written...
I don't think you're likely to get banned for one rule break...
Would you say the same thing to someone who plagiarizes or breaks another forum rule? Rules are rules, and there can be no partiality for it, no matter who is the person in question. Someone should either follow the rules, or get ready for the punishment. So I would suggest mday to be patient in this matter to avoid getting into negative sides of the matter.
Hilarious stated this outright that people will get leniancy if they are more notable on the forum. Usually people get banned for plagiarism if there is strong evidence that they have done it multiple times. I don't think a sole plagiarist (that hasnt broken any other rules) has beem nuked (as far as I can tell at least)...