Couldn't all this hassle have been avoided if you had called well in advance and asked? At least you would have found out and made other arrangements for the gliders and not even had them at the airport. Many airlines will only take cats and dogs for check-in, this isn't unique to Bangkok Airways.

Something about this post is trollish...so if I've fallen for it, congratulations to you. If it's for real, my apologies for suspecting a prank.