My guess would be that actually wearing pink hair might be rather easier these days. For one thing, styling products have improved a great deal. During the 80s, a lot of us were lathering plain old hand soap into our hair and leaving it there so as to create a spikey look. The product manufacturers are on to this problem by now, and, provided you can afford them, you can take your pick of specially prepared styling glues. Also, conditioners seem to work a lot better than ever they used to. In other words, even if you did decide to massage copydex into your roots for the benefit of a special occasion, you'd probably be able to repair most of the damage after one or two washes. Better yet, it would appear that it's no-longer considered a sin to style one's pink hair as if it wasn't pink at all. (Personally, I prefer Helen Mirren as a blonde, although that might be because I'm remembering how much more difficult I found pink as opposed to peroxide blonde hair to be. The pink pixie cut looks cute on her; then again, I suspect a blonde pixie cut would look just as cute and probably just as playful, thus the main purpose to the pink dye job seems to be to generate column inches rather than simple admiration.)
All in all, I guess pink might be ok for a special occasion; changing one's hair colour is almost as easy as changing one's handbag, after all. All any of us really need is an excuse, I think.