Great pics, thanks for posting!
As mentioned above, don't take offence at guys not waving, sometimes they are just too busy and/or in the middle of something. Whilst it only takes a second to wave, it can break up one of many sets of checks which means starting again to ensure you don't miss anything critical. These Harrier boys will almost always be on a tight timeline to get airborne so sometimes/often won't have the luxury of chilling out and waving at passers by.
Keep up the good work with the phots, they are always nice to see!