Didn’t specify how high the cliff is so potentially might not cause injury, for the sake of this though I would not jump for them.
Would you rather death by drowning or death by being set on fire?
I think it should be one of those things that can be interpreted in different ways to enhance role play. If you want to RP a road trip then there is nothing stopping you but by enforcing a rule where you must RP the distance it will be impossible for law enforcement to work unless they had a stupid amount of officers split across different departments on the map.
I think restricting the map could be a good idea to start with, it would force players to role play in a portion of the map to start with however this would need to be monitored uber carefully as the player-base grows. It would be very difficult to manage the expansions and what house/businesses should be available to what players when the expansion is released.
Although a good idea I think it will be difficult to manage and not worth the extra work/issues it may cause.
Hopefully this server can get a lot of traction when it opens up and the map won’t feel as empty as you think.
Getting back into RP after 5> years, I enjoyed my time on LS:RP and also RC:RP back in my SAMP days. I am hoping the nostalgia doesn’t wear off quickly and I enjoy it as much as I am hoping I will.