What do people think about placing "goals" on their travel bugs (reaching a certain country, event or cache, for example)?

I've mentioned before that we consider moving TB's one of the more enjoyable parts of geocaching, but lament that - even though we've gone out of our way to help a TB to it's goal - that we've NEVER received a thanks from the cache owner.

(And several times we've gotten emails from TB owners asking why we haven't moved a dropped of their TB yet - when we've only had it for a week or less!)

I think communication between cachers is great, and often email a cacher to thank them for a photo of a TB in an interesting spot, or for helping move the TB along.

Why can't people say "Thanks"???