[TMWNN]

The rescue kit built for Apollo during Skylab, while a precedent, is not a complete one. Apollo was the only vehicle available in that situation, so if the CSM already at Skylab couldn't be used, the rescue CSM had to launch. There are alternatives to (say) squeezing in more than four people into Crew Dragon.

[radicaldreamer]

In case of a true emergency, would squeezing two people into one seat be that dangerous? (As in, is the safety envelope of the vehicle tied to weight in each seat?)

[mlyle]

In an off-nominal re-entry, the people can be subjected to 9G's for a sustained time, and impulses much larger than this.

As a result you really want to be in a proper seat.

[wil421]

What about duct taped to the floor?