Personally, I like to be different (it's my hippy heritage - I still wear what's left of my hair long). So, for me, the longer and slower the popularity rise of kilts the better.

Pragmatically, if kilts become trendy, there will be a brief burst of people wearing crap cilts (made from the crap cilt clan tartan - from the Table Isles). And then those oh, so trendy fluffy heads, will abandon the cilts as suits their traditions.

Some of the fluffy heads will see the light and join us, "we few, we happy few, we band of brothers*".

*Shakespeare King Henry V, Act IV, Scene 3.