Got a text message allegedly from my ISP about an soon-to-be-due bill that was roughly *twice* my monthly bill, and click here to pay it.
Oh, hell no!
Then I remembered that last month they were revamping their online payment system and said they couldn't accept payments at that time, but wouldn't count them as late if paid with this month's bill.
Which means it's actually legit.
Still not using that link when I pay the bill, though.