As a buyer, there is basically a nonexistent chance of them taking action on your account. 40% of active players RWT, Jagex would be retarded if they banned any of them.
If you take all the necessary precautions then buying/selling gold shouldn't be too dangerous, however there is always a chance of being scammed no matter who you deal with.
Yeah, sorry to not be clear this on talking about jagex banning it not the fact of the chance of being scammed while buying it, i don't have the worry of being scammed because I have a friend who sells.
Over the past 3 years I've purchased over $2k worth of gold, never been banned on any account to date. Jagex targets the Gold sellers, not the purchasers as they know that a large chunk of their community purchases Gold/Items.