Hello German,
Thanks for you comments and suggestion.
There are two problems with tagging. One is that the gallery software that I use as is doesn't support it. The other one is that I prefer not to hurt the privacy of the people on the photo's (even more) since I normally don't ask permission to take and publish the pictures.
Hope you understand my stand on it.
Cheers,
Adriaan.
BTW. There is a link to my email address at the bottom of this page.