Are you wondering about 07/EOC? EoC has higher risk I'd say, but just play it smart. Use an account that's active/has p2p/skills trained often and what not. Don't make a new account and dump gold on it, that's fairly obvious - unless you start training / playing that account.
As far as 07 goes, I haven't heard of any RWT bans as yet. Also the fact that Jagex allow trades of gold from EoC>07, it's quite hard to trace at current. I'm sure in the near future there will be something more capable of tracking down RWT'ers.