It’s not just VA, we have them at QF also I wouldn’t limit the net to SG, WP can be worse. I am too lazy to change the QF RFID luggage tags so depending on what bag I use it could be any one of the 4 QF colours they all do the same thing. When going through security I just pick the shortest line.
I did have an occasion a while back when a SG felt it was their duty to police the priority boarding lane. The individual felt obligated to inform me that the priority boarding was for SG and WP and PS should be in the general line (I assume they caught a glance at boarding pass on the phone), I just thanked him for letting me know and remained in line. Not happy with my inaction to move over to general boarding the individual made some comments to his travelling partner and had another go. This time I was informed that if I wanted to use the priority boarding I should get some real flying time under my belt and earn the right to use the priority boarding, then continued with other mutterings and similar comments.
I normally do not get too fussed by other travellers however I had enough so I just put the phone back in my bag and pulled out my P1 card for boarding, as he glared at the white card I just casually mentioned that sometimes it can be a bit difficult to notice the colour difference between a PS and P1 on a phone unless you are familiar with them. Nothing more was said. You run into all types, it’s just a part of travelling.