That seems odd, since Jenova isn't a very high population world. Maybe it's just easier for them to make characters there since character creation is never restricted. I only have to take names off mine every 3-4 weeks or so.
I'd like an easier way to report RMT, but the flip side is it also makes it easier for people to make frivolous reports against people that they don't like (or just want to mess with for one reason or another), leading to more crap for the GM's to sort through. Honestly, we're lucky we even have an in-game support desk - many games require you to send tickets through their website instead. Getting rid of free trials would basically be shooting themselves in the foot as far as getting new players into the game. Not to mention that it doesn't really seem like trial accounts are a huge culprit; I frequently see people with bot names at level 50. There are mass bannings from time to time, but it unfortunately only does so much. Gil sellers are pretty tenacious when there's profit to be had. No matter what they do to combat RMT, ultimately the only way to get rid of it entirely is for people to stop buying gil.
Do I like RMT? No. Do I let it ruin the game for me? No. I blacklist and move on with my day.