Lolz at the Firelord and GL owning. 😛
PIS is indeed a constant issue. But PIS also applies to non-combat Feats. I've seen characters that are well below Class 100 lift things that they have no business trying to budge.
That's why I always go with "consistent" or "repetitive" as a precursor for gauging what is PIS, and what is simply part of a character's power set. If they do something idiotic once, it is likely PIS. If they do something idiotic several times... then it probably isn't as idiotic as I thought, and I may need to re-assess just where on the "comic food chain" said character truly sits.