This is a very disturbing problem. I could understand if it was random people, but we are talking VIPs and MVPs mass rdming. I can't even play on the server anymore, I should just stick to the forums.
These players you are referring too sometimes accidentally RDM, but sometimes there are just trolls who donate and then RDM. These players you may think should know the rules and stuff, but not all of them do as some are quite new to the server, and decided to donate or was gifted the rank.
As I see it, the problem instead lies with those of you who: 1) lack the knowledge of TTT. 2) Make thoughtless and impulsive conclusions about a situation. 3) And neglect to reflect on why they may have been killed.
This may be true, however, I have been killed multiple times from a VIP or MVP. In fact, one time, a VIP killed me and I was his T buddy! I do not lack knowledge of the game, I have over 2000 hours on Garry's Mod and almost all of that is TTT. And maybe 100 hours on DarkRP.
Now, go prove to me that you're not the one getting butthurt/misunderstanding the rules and report with evidence. How do you expect to get them dealt with (if needed) without a report?
How many times have people gotten away with RDM? Do you remember how many breads you've eaten in your life? But seriously. It's gonna happen. And money doesn't suddenly make you immune. People try to do things when staff aren't on. Best you can do is take evidence of repeat problem players and make a report on the forums. Just make sure not to report only single instances.