Haha! Yeah I remember some guys won't even ask me and just forced a new higher VAPP and telling me how much it's going to save the day...
I also like to add a few knots ( 2 to 3 knots) on the old birds. Especially A319 in conf 3 to lower the nose when the pitch is ridiculously high or on the old A321 when the VAPP is too close to VLS. 1kt is roughly 1 tonne, and few knots seem to work fine for me. I never question the VAPP of my colleagues tho. Should be a personal choice; Not a mandatory thing.