That’s not good. It really is a “blue” day for Jet Blue.
Place placard inside all wheel wells in multiple languages.
“Stowing away ,or, hiding within this location will kill you.” 
What else are you going to do, add it to your pre-flight check list?
Of course, if this does get implemented and someone does slip by
and kills themselves making the attempt, the pilot becomes responsible.
Don’t you love it…