"I say there is no muppetry involved in keeping an eye out for 9 red jets.
They are one of the easier hazards to deal with."
Especially when NOTAM'd. Keeping out of the way is one thing, but deliberately getting close by is another. If an incident or accident were to take place, caused by the proximity of another aircraft, it doesn't take much to realise who the CAA, the press and the general public would hold negligent, despite pleas of "We knew they were coming, but it's the open FIR".