what's your input on the chair's player type's? I think adding couchest, dumpster's are a good idea, but as you said, they would cause people to be lazy. but also keeping brick count's low. last time i checked low brick count = less lag.
Except for more faces to render = more lag than your lower brickcount saved.
That's why there are limits on the number of JVS bricks per player and per server.
Ontopic, there was an old chair vehicle once, but I lost it (and all my other addons) on v20 update. Although, I might be able to find it...