Not true, since rep can be boosted by more fake accounts.
I've lost 50+ rep in under a week and I'm sure if someone wants to cheat the system they can get 200+ rep is a short time if they wanted.
Define "a short time", please :)
Keep in mind that most scammers are lazy. Most of them won't go through all that trouble just to scam people from a couple of games. They want to pop in, get a game, and scram before anyone wises up to their scheme.
Short time = whatever your system allows and/or how well the script works.
If someone can make a script that makes 100s of accounts, then have those accounts vote up a specific persons posts.
If your system works that way, ie> vote up/down increases/decreases rep, then thousands of upvotes could possible give a lot of rep.
And you personally told me in a pm rep means nothing... anyway... so why bring up the low rep/trust issue?