My advice - if you are worried and want these encounters to be discreet, then make sure YOU are discreet!
Create a fake FB account, fake LINE profile to an fake email and make sure NONE of your real life contacts are connected to these fake accounts. Never send YOUR face-pic (nor revealing tattoos). When/if sending money, do NOT do it from your real bank account/paypal etc - send cash via CDMs or find other more discreet ways. Of course never give your real name!
If you follow these rules, you can send as many dick pics as you want!
BTW - i also had a Phil dom threaten me (my only time) when i could not meet her and refused to send her some cash...i told her to feel free to publish whatever she wants AND, i knew where she lived and may report her to the cops...maybe,,,,of course that was the end of that relationship! :-)