It's Morphin' Time!!!

So, if it's morphin' time, why do they scream it to the world? I thought they were trying to keep a low profile here. And yelling out "it's morphin' time!" kind of tells the whole city what you're about to do, including the villains standing five feet away from you. But of course the villain is just going to stand there patiently waiting for them while they all take five minutes to shout to the sky what animal, ninja, space police person thing, they are today and change into their morphin' awesome defeat evil costumes. The villains always do this in these kinds of shows too. Just stand there waiting for you to transform, activate your magic staff or whatever, summon your trusty whatever it is, etc. It's so thoughtful of them, isn't it? What would happen if one of them interrupted? I mean, is there some sort of cosmic thing that will protect the Power Rangers from harm if someone has the gall to attack them before they've finished their heroic shouting and changing of costume? Didn't the villains ever think of that? Just go and whack them over the head while they're busy standing there holding up their, whatever those things are that let them transform, I'm sure they have a name, everything has a name. Ok, I just googled it, they're called morphers. Morphers? That's the best they can come up with?
"What should we call the things they use to morph?"
"Um... morphing things... I know! Morphers!"
"That's brilliant!"
But when you run around in brightly colored tights and helmets defeating evil and screaming out to your arch enemy you're going to transform now, I guess it doesn't matter what the doohicky is named you use to do it.
And if those Super Readers on that PBS show would just combine those things they ride around in like they do to make the megazords, they would be able to solve their problems much easier. Or at least look much more cool doing it. I'm just saying.