Agreed, but they will x-ray them.
Sorry should have explained in more detail, was pissed.
It depends if it's an airport / regulating body rule that you cannot fly motorized bikes, or a BA rule.
The dudes doing the xraying are trained to enforce the faa (or European equivalent I guess) rules and any local airport policies, they have nfi what batshit stuff individual air lines have got posted on their website this month.
Generally I'm not a fan of flying bikes, it's a pita stripping them and packing them well enough that there's a reasonable chance the airline won't destroy it, unless you buy a mega expensive bike bag.
Last time we did morzine, we loaded up the vengabus with 8 bikes and 4 lads, road tripped it and the rest of the lads flew out and met us. Calais to morzine is a pretty easy 8hr drive or split it and stay somewhere halfway down france, I've done morzine in a oner, but it gets long when you add the shitty drive to Dover. Make sure you take something with cruise control and AC. And if it's a rental van, make sure you have the paper work to get it out the country. If you choose to fly, you probably don't need to rent a car, there's regular transfer busses between Geneva and morzine.