One thing that I find really stupid and confusing is when people trade five mind runes and a bucket of milk for 100m.
If you just trade the 100m and that's that, it could be because you owed people money. You could give it to someone you know. irl friend wants to help you start in the game, etc. There are a bunch of reasons.
When you put something else in the trade window, though, it's now representing that you're trading 100m for those 5 mind runes and bucket of milk. Who tf would pay 100m for five mind runes and a bucket of milk? There has to be something up with this trade, let me look at it...
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Obviously, if you're trading 100m 50x a day every day of the week, then that's a different issue that gold sites have to deal with. If you're trading and both accounts are on the same IP, that's another account as it's very rare and can be self trading/gold farm mule. But other than that, you shouldn't have an issue unless you make an issue trying to be stealthy. With a lot of things in life, I see people messing up because they're trying too hard whether it be in other games, they try too hard to do something and end up messing up; in life when they try too hard to get the girl or the job, you just look really desperate and people don't like desperate because desperate people do stupid shit.
I just go with the flow and play cool and haven't had any issues at all and very few issues in life so it works and i'll just keep doing that.