It appears that there are many who find blowing up PM's to be a fun distraction. While I don't agree with this, it doesn't stop others. I use judgement when soloing. Or, when the arcanes in the party announce that they are either sorcs or archmages. Not worth the trouble otherwise.
But, I have seen it used in a similar way to grease a number of times since it's been available.
Can't say much for anyone else, but typically I expect Pales to be watching themselves. This even though I carry the spells on my divines to help out in a bad situation. I agree it's silly. This is why I point out the cheaper cost of throwing a res vs playing a guessing game and running the risk of losing other party members chain casting at them when they eat a DBF and drop too low.
The real problem though is that you cannot tell when a PM is in and out of form in the middle of large battles. As for being complained at or blamed like the OP describes I only would have 3 words: Ha ha ha...