BOI into the 2012 Tornado Collision over the Moray Firth
LAL.
I have. The Hawk T2 and it can be precisely as you say. Every battle turn brings a TA which will then steal one of your MPDs. It also trips off at large angles of climb and bank triggering further avionics warnings (which will self reset but its still annoying!).
It proved useful on several occasions but my worry is the breeding of a blasé attitude to lookout. It is not a panacea in its current form.
As I said previously I'm not going to debate how it could have helped in the accident but I can at least talk from experience when the issue of TCAS in FJs is raised.