In terms of risk - radiation-style damage for larger ships might be a good one.
Another possibility is being spit out randomly within say a 5K radius of the other side of the jump hole. It could make distances closer - or make them further away!
In terms of attracting visitors to Rhineland.
I would like to echo Prowler's point regarding Rheinland/GMG negotiations.
We have come to the table in good faith - and we are still sitting there waiting to go.
Mates, the ball is in your court if you want more visitors...