I find this to be quite useful when approaching bounties. I remember once I did it while going after this one guy who was taunting me, and as soon as I went off the radar, he said "oh he went offline"...and then BAM! Haha.
However, I don't see that many people using it. First time was actually last night, from a guy who went off the radar then killed me. For $500 I think it's pretty good value.