Are non transponder aircraft a prob to you guys

[Spotter]

A couple of years ago a pair of Hawks had a close call with a pair of flexwings just outside Class D controlled airspace. The flexwings were barely showing on radar & not talking to me either. Luckily the Hawks saw them & managed to avoid, but it was pretty close. Whilst there is no requirement to speak to ATC in class G airspace maybe all microlight (and light aircraft) pilots should take a minute to consider the wisdom of skirting right on the edge of controlled airspace in aircraft that have low radar visibility without at least telling ATC that you are there. It might be legal, but would that be any comfort to your family when you're impaled on the business end of something fast & pointy? The great thing about a transponder is that there's no way you will be just ignored as another spurious weather return cos as far as I know even a big nasty cumulonimbus can't squawk 7000.