We have three terms here in the cupboard:

-Colloquial geek: someone who likes geeky stuff and does it for fun

-Circus geek: addict who debases themselves at a carnival as a job

-Internet troll: someone who bothers people on the internet for fun

I started with a joke conflating colloquial and circus geeks. What is the shared "blackness" of these "kitchen apparatuses" here? That nobody really wants them? Why did you decide my joke was a good place to reply with social commentary about internet trolls??

What belies your joke is a kernel of truth. As they say, "birds of a feather...". Posting in a forum that facilitates social commentary implies that you should expect a social commentary when you post on this forum. Any other questions?