/.../ my mom decided before we moved that a fourteen-year-old was too old for Star Wars and G.I. Joe action figures and gave them all to my young cousin /.../
This is not the first time I've heard about something like this.
It always makes me wonder what kind of parents it is that don't respect their children enough to also respect them as human beings: I mean, the same people probably wouldn't dream of taking a bone away from their dog.
I don't know if I'd go so far as to say she didn't respect me as a human being or anything that drastic. I was upset, sure, but my initial post may be a tad hyperbolic in describing how mad I was for humorous effect.

For my mom, it was a combination of us having to move a lot (so getting rid of things was frequent) and with both of my parents being raised in households with seven and ten brothers and sisters, respectively, where passing your toys and clothes down to the younger kids was commonplace and expected (I only had younger sisters, so they didn't want most of my toys, thus my cousin got them). Plus, she had this thing about "no clutter" passed on from her parents, and I am admittedly a bit of a pack-rat.
Exactly, LEGO isn't a kid's toy - It has multiple uses in a grown up world! -Whenever you need a little thingemagoo you can either go to the DIY shop and pay a fortune for it -or build it in LEGO (or Mechano -of course- if that's all you've got)
Lego Digital Designer is not quite as fun as working with the actual pieces, but still pretty cool. And it's free.