I've done a search on this but couldn't spot the answer so here goes:
On Google Earth, go to any of the larger airports or especially Pinal Air Park in Arizona and there appear to be a number of aircraft where the detail of the carrier etc has been 'whited' out. Check this out as well at Eldorardo Int'l in Bogota and there's a DC10 (?) taxiing near the terminal and the detail has gone on this too. In some instances, it's probably white out by the sun but in others, it's definitely been done intentionally.
Anyone know why?