Being Bombarded with Spam Accounts

Lately, I have been bombarded with spam actors signing up for my list with account info that is gibberish like what is below. Anyone else have this happen to them and what to do about it?
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die.wupper@web.de
has subscribed

Subscribe page: 1
First name = sCXtSnZeodTpjhRwHfQLGX
Last name = GWhtnsSZrZWyccNht
Phone Number = QUEIECKhmfTJZMqqLAFWyx
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I’ve had that recently. I think if subscribers have to click a confirmation link it’ll work out ok.

The confirmation link will be clicked, this will not prevent bogus accounts from polluting your database.

Adding a CAPTCHA seems necessary, but I don’t have experience with that… yet. I need to do that promptly, because one of my lists is now getting hit with the bogus signups. The last time it happened to another list, I was getting hundreds of signups (all “confirmed”), and I just yanked the embedded form offline (it was rarely useful anyway) - yet I continued to get signups, so I had to disable the Subscribe page within phpList.

That’s interesting. I had a spate of this but none of them were confirmed.