"Puffy Ack" (i.e. 5 inch or 88mm) is indiscriminate....by its very nature. Death by friendly fire was a sad but real occurrence in WW2.
If you are near an nmy plane, tank or boat etc, and near ack (whether nmy or fdly), you can die by them. It is realistic and correct for this to happen.
Funny, I like the Tempest also, and would be unhappy at the idea of losing it by this method. How would you feel if it was a 110 HOing you? Or a N1Ks? The perkies would be gone all the same...like in a lottery: you pays your money, you takes your chances (sic).
It is even worse than that...what if you landed and popped a tyre / UC, then couldnt get on the runway (has happened to me in a bomber)...just go round and round in circles like a tank with a dead track.
The point is, if you arent willing to lose the perkies by whatever means is possible, then dont spend them.