We have such a bullentin board in a hair salon we own and once a week I go through there and remove any business cards, flyers that have been put up without our permission or from non-business customers.

I can understand why people do so. People will come in and start pulling off someone else's cards and placing them in the trash just to use the push-pin.

We have had persons place their cards directly over the licenses we have to post on this bullentin board. If a community service type notice or something I might leave it up for a week or so. Anyone else's gets trashed or we use the cards to take notes upon.

You might ask the owner of the boards your posting on for their permission and explain whats happening.

If you go asking the suspected person, they are likely to say they are not the ones doing it anyway.

Nothing good about a conflict.

Rick