If they ask for a Dr.'s I just say ok and hang up. If they require training like the FAA runway safety training that they don't want to pay for then I send it UPS COD to them. If they BS with me several times in one day and reassign me then I call fatigue. I've done it twice. Not afraid to do it again. Though this was months when based in CMH. Out of STL I haven't had them try many tricks.