Regarding a cool name, in order for that to happen, someone on Sythe would need to offer it up for use, or sell me (or whoever runs it) for a good price.
Regarding everyone mentioning that it seems risky, I don't really understand how. It's just a FC and no JMod cares enough to join our FC. Hell I doubt it would even be widely publicized. I honestly don't think it would be overly active unless people tell their friends to join it (and possibly expand to a little bit of advertising in RS.)
Now, I wouldn't go discussing RWT and/or botting in it just in-case some asshole reports you, but there would be no harm in just talking about sythe/runescape/irl/whatever. Well, at least IMO.
Edit: Also, it doesn't need to be limited to 07. FCs can be joined by both 07 and RS3 peeps