my CapitalOne visa is my oldest cc, over 20 years. i've maxed it out and paid it off a few times in that stretch, and they diligently upped my limit into the tens of thousands, despite never making more than $40k a year in my entire stupid career. the last couple years i haven't carried a balance on that card, and just this week they sent me a notification that due to having a credit limit in vast excess of my balance, they are going to "review" my account in april and warn me that my limit will likely be lowered.
which isn't exactly thugs knocking at my door threatening me, but it is a bit distasteful. think i might buy $10k worth of ammo and yoda grease next month for the hell of it.