Anything involving farm animals.
Run a meth lab?
Watch the Kardashians on TV.
Watch porn on TV.
Hold Klan meetings.
Close the windows if the sun is up.
Play bass drums.
Live in California or Japan. Earthquakes and glass houses don’t mix.
slam the door?
sunburn easily?
Play darts
Play naked leap frog
Keep minorities and women below the ceiling.
Leave nuts and seeds lying around inside the house.
Put their valuables in a wall safe.
To be fair no one should do this in any house.
forget they are in a glass house.
Play hide and seek.
Hide those dirty magazines under your bed or under a throw rug if your bedroom is on an upper level.
They shouldn’t return the house for the 5 cent deposit.
Develop photographs.
Gossip about the neighbors using sign language.
Nor involving squid and octopus.
I find it interesting that many of these assume the glass is clear. Not that having a glass house in the first place is logical at all, but if anyone was to build one, I’d assume it would be opaque from the outside.
Of course, that wouldn’t guard against thrown stones…