Pete
You're missing the point of the thread.
Whether there is radar cover available or not you still have the problem of the slow moving a***hole tracking across your centreline at the same point as you want your IFR traffic to be. You can see him, and you have to avoid him. End result is IFR traffic goes around, reconfigures and has to travel 15-25 miles dependant on type to get back in the same place again - while Mr dullard floats along with his thumb up his a**e and his brain in neutral.
This due to a total lack of awareness. Do you really think that is acceptable?
CM