Advertising on Facebook is a several-times-a-day job. If you just put up a page for your company and ignore it, it's the same thing as putting a stapling a flyer advertising your company at the bus stop and someone grafitti tags it. The longer you ignore it and leave the eyesore up then the more people will be irritated by the flyer, your company. If you had checked on the flyer and replaced it right away then it wouldn't be an annoyance.

Social media can be a powerful tool if you use it for real time dialog and interaction with your customers. If you use it as a free billboard then you are going to get exactly what you bargained for.