Mostly not, many of my friends think laser shows are exciting and beautiful and that my lasers are pretty cool to play with. I generally get pretty good reactions, but it might be because my friends and family are awesome.
A few times I meet people who don't understand why I spend so much on them but when I ask them what better things they would spend the money on they usually go "Uhh.. like clothes and.. uhh, cinema trips and alcohol or something.." and then realise that they would "waste the money" too.
IMO when you have fulfilled your needs such as buying food and basic clothes, paying your mortgage and your other bills (and of course provided for your family), you should spend the money on whatever makes you happy, not what some other people think is supposed to make you happy.
In my case I spend the extra money I have on concerts/festivals, my bike, lasers, clothes, partying and buying new computer/MP3 player/phone when I need it.
I also spend a bit on some other interests such as Zippos, pc games, knives, books, crystals/fossils, paintball and softair guns and cigars. (Wow, I just realised how much stuff I collect, and I didn't even mention it all!)
The clothes I buy are good quality, but they are bought for the looks I like and not just because of some brand. Cigars are only smoked 2-3 times a month and when I go out I rarely drink huge amounts, and I usually have some of what I drink with some friends beforehand.
Many of my friends buy really really expensive clothes, smoke every day and buy a lot of drinks in town and that alone makes up for most of what I spend on everything else myself, but I have just as much fun going out (usually more) and my clothes often look better because I wear what I like whereas they will wear anything with the right brand name.
However the people I hang out with see this.. they know that they are just different interests and fully respect mine. They enjoy laser shows at concerts and in clubs and think it's cool that I have lasers myself (and even more that I soon have a scanner), but they would not buy one themselves.