You wait until her contact number is shown. There's often a good reason why an SP has removed her contact number including they are on holiday and don't want to return to 2371 messages waiting for them, which all get binned anyway as she doesn't have the time or patience to work through 2256 messages saying "Hi".
Other SS shouldn't share the SP's number as the person asking for the number could have been banned by the SP for a reason, so they don't want them to have their contact number.
I'm with you on this
Numerous reasons the list can be endless
HxxxN one of the most requested numbers
As previously mentioned she's busy enuf already
& doesn't need to be bothered with new punters who may / may not turn up etc
It took me a couple of well worded AW mails to get her mobile in reply
The optics of UKP becoming a mobile directory aren't IMO the best Adding mobiles [when showing] to notes on Awank is easy
Likewise to the punting mobile
Its not hard to sometimes find mobiles elsewhere [not on UKP] with some research
My impression on a general basis where UKPers request mobiles they ain't exactly those contributing much to the site