I think I asked years ago but the topic just came up again a few minutes ago so I need some fresh answers please,  
why do you hide your whitelists if you have any?

Nah you don't but I hate to be told NOT to do something so maybe I will send you a PM afterall. lol

Hence, I don't have any.  I also never asked for one, kept reading here that they were fairly useless.   I have OKs on P411 which is much more widely accepted.  

As for the OP, I have no idea why.  Could be they want to hide some of them like GaGambler suggested, or they just want to keep it private to keep people guessing.

but that didn't stop several women from giving me WL's. ironically only one of them have I ever met.

I wouldn't hide mine coz then what's the point of having them?

...by another provider.  I don't write reviews but she knew I was seeing other providers because of my whitelists.  I don't ask for whitelists but I'm not going to tell someone NOT to whitelist me.   ATF?  More like WTF?  We weren't in a committed relationship;  I didn't hit the ceiling when she got a new review.

... the only people who should care about my white lists are providers who need to screen me and wish to see them for that purpose.  And in that case, I gladly make my white lists visible.  But I haven't had any provider ask to see my white lists for a few years.  I have many P411 OKs and can provide references beyond that (including providers who've white listed me) if needed.  

I don't use my TER handle to make appointments.  If providers don't know who CDL is, then I can write an HONEST review without fear of blowback if the provider doesn't like the review. That's why I don't use whitelist.  Other guys may have other reasons.

I saw the thread above where some guy's ATF got cool on him after she saw all his likes on P411.  

50+ indies I've seen over years can't whitelist me either because they don't know they saw CDL.

But I've never asked for a whitelist. I know one provider, now retired but still has her TER profile, whitelisted me 3 years ago.  I would consider myself a good client. I can provide valid references that date back 12 months.  I'm not a timewaster,  I don't NCNS, I show up showered, or take a shower when I'm there, don't play games with the donation, don't overstay my time, and don't suggest unsafe activities. And I've repeated with 3 of the 10 women I've seen, would've repeated with 2 others but due to their own circumstances I was unable to.  

I hide mine for a simple reason. I got one a few years back from a gal unsolicited after a session. She used to be a good friend of an ATF. My ATF was perusing my WL's one day, saw I had seen her and went BSC. It was rather uh unpleasant for a period of time. Just such a waste of time and energy. I've blocked mine ever since.