Not the worst idea anyone ever had. A bit unfair and completely politically undoable, but the anti-suffragettes predicted everything bad that has happened to America since female suffrage.
When America was first founded only land-owners could vote, and only white male landowners. Black freemen were not allowed, even if they owned their own land. Little by little we began changing that, extending the franchise to more and more people. Now anyone can vote, even illegal aliens if they can get a ballot sent to them (it's still illegal but if nobody wants to stop them...)
But the fact is women vote based more on emotions, at least many do, just as the women who opposed suffrage said they would. And it's especially true of young women who want the government to act as a surrogate husband for them. Many such women have bought into the feminist view and do not want to be beholden to a man, so instead they want to be beholden to government. They find standing on their own two feet to be less enjoyable than they thought. Working is great when you can quit without worrying; men rarely have that luxury.
At any rate female suffrage has profoundly changed our country and not for the better.
Granted, it's unfair to take it away from all women; older married women tend to vote far more logically, and do not support the crazies as the young uns do. But how do you take the vote from the idiots?
At any rate it's an idea that won't happen. We've been on a long-term trend of extending democracy to everyone - the very thing that turns a republic into a democracy and inevitably into a tyranny - and that isn't going to change because people believe in democracy, something loathed and feared by the Founding Fathers and with good reason. Democracies descend into "tyrannies of special interest" as Plato warned. We are there now to a large degree. That is exactly why we elected Trump, to break out from under the tyranny of special interest imposed by the elites.
So de-suffragizing women won't happen soon, but it sure is nice to think about. I wish there was a way to just de-suffragizing liberal women, but until we develop a test for that it's beyond our reach. Of course if we could develop a test for liberalism we might be able to come up with a medical cure.