Had them in mine for almost 2 years, never been flashed, never been pulled.
Although, I will also add that yes the light scatter is horrible, the DO blind on coming traffic, and a down right dangererous if there is any water on the road. I got them because I thought they look good. 2 years later with abit more maturity I know realise they don't. The fact they are still in there is down to my laziness and lack of replacement bulbs.
With regards to the M.O.T, mine has been through 2. The first it would have failed were I not good friends with the tester/garage, the second, which was done at a different garage that I know nobody who works their, passed no problem. It's just down to luck lads.
They are illegal in anything other than projector lenses with washes and auto levelling.
H*R bulbs, which are HID bulbs designed for reflector headlights, ARE road legal and you will pass and M.O.T with them. There are the bulbs that you see in Lagunas, Honda Civics etc...