Similarly some can't wait to jump on the "moaners" and tell everyone what a fantastic supporter they are. Sadly both sides of the arguments have their idiots.
I get your point, but I think moaning about friendlies is a very new phenomenom which has been enhanced by twitter et al.
Back in the 90's when coverage was less, no one cared because they didn't see the results. You could ask your average Albion fan who we played and they probably wouldn't know, or at least not know the score. Now it's all over the internet and is more significant in that sense to fans. Case in point, I watched the PSG and Vitesse games on streams and the Kiddie game had highlights. It's very, very new that friendlies are getting coverage.
So I'm sure this kind of result would have happened in our recent history albeit with less widespread information on the matter. In fact, under Hodgson we lost to a non-league USA team, but even as little as 3-5 years ago there wasn't as much unrest or information freely available with friendly matches.
Anyway, whilst I personally think the result was academic, I can see the tension with some fans especially due to our lack of signings. It seems the club is in transition right now which people don't like, i.e. not knowing whether the takeover will genuinely happen, people don't like being left in the dark.