Tuned In,
If you think a TCAS advisory necessarily leads to paperwork or CAA involvement then you really should have listened more carefully your groundschool. That would be ridiculous!
TCAS RA (Resolution Advisory) requires ATC to be informed as soon as possible and a written report sent to the CAA within a time period by the commander. Rather than lambasting, it maybe more appropriate to think out what kind of advisory was being referred to!
I think it is a gross assumption to assume a Class D bust isn't dangerous (surely the most common too?). Gatwick is 'only' Class D after all. An airspace infringement is exactly what it says on the summons