I'm sorry. I really don't understand. If someone is travelling for their (airline) employer who doesn't normally travel, why do they need 'crew' tags as presumably they are not flight crew? And if they are crew for the day, i.e. training instructor, why doesnt the airline have the tags?
I've read in another forum (SLF wise) that some people think they'll magically get an u/g or more by having these tags. A bit like those with their Plat tags from several carriers I guess. I can appreciate that this is not the case /for/ aviation professionals as they can always ask their colleagues to do some keyboarding... but so why the need?