We are pretty certain that our wedding favors were stolen. We brought about 10 extra favors just in case some got lost on the day or something. Plus some guests didn't take them (I think some couples only took one) - so we had about 20 remaining. They were in pretty cardboard boxes filled with delicious fairly expensive chocolates - ones that cost like $5 per piece. As we were packing up my mom was going to another area to help out but asked someone to pack the favors in a plastic bag and told the venue people that we were taking our favors home and not to chuck them. (because they were clearing the tables)
When she returned 20min later, they were gone. And the venue people said that one of the guests had taken it for us. Mom asked the manager lady in front of several other staff and they all seem to have witnessed a guest taking them all. Mom thought that whoever took them would just contact us and drop them off. No guests ever contacted us to say that they had our favors.
The thing is, if some cards or gifts were stolen, the thief could be a stranger that wandered on to the grounds. But the only people who would've known that our wedding favors were some nice chocolates and not something useless would be the guests and venue staff. And it saddens me that there is a high chance that one of our guests took off with the nice chocolates.
The people who were helping out with packing up left their favors with the extra favors to help us first and they were going to eat them later. So it's pretty sad that the most helpful and the people closest to us didn't get a favor. We bought the chocolates on special in bulk so we couldn't just order them again. We ended up sending those people some other small gift because we thought we wanted to give them something as a thank you gift. It's a small thing in the grand scheme of things, but I just get sad thinking about the fact that someone would just steal something like that at a wedding.