It's never occurred to me that it might be but I've just been told by a grumpy friend that it is!
We have the biggest (8ft) one in the sitting room - that's the one with all my 'posh' decorations on. Then I have a 6ft one in the dining room because it's nice to have a tree where you eat your Christmas dinner. The DC each have one to decorate themselves in their rooms - that's another three, and finally I have a little one in the main front hallway.
I also have fairy lights draped everywhere - up the stairs, across the ceilings, etc. Actually I have enough that we don't need to use our normal lights at all, just twinkly Christmas ones.
Anyway my friend said to me that she'll have to remember to wear her sunglasses when she comes over so she doesn't get a migraine - and that it's a shame having all those trees competing with each other.
So am I actually mad? 