Is buying FB likes or participating in exchanges negative, long term?

If you get what I would classify as 'fake' fans liking you page, is this bad for down the track when you want to use paid advertising/paid highlighted status updates?

I think to successfully use FB you need to use FB's paid services, much like PPC complements SEO, but... does the fact that you have 'fake' fans affect the cost of promoting a post? For example, you will be paying more to make your ad spread further, but you will be paying extra money to 'reach' those fans that are 'fake', which do not actually interact with the brand, and are merely there to inflate the fan base and make the brand look better.

I would like to use both methods, both fake fans and FB advertising, but I guess I'll go with the real deal if they don't work well together.

Thanks in advance to anyone who can help.

Social networking site is just for making an online presence for a brand, a brand cannot sell its products on facebook or twitter so fake like will not effect anything it will just attract more users towards your profile page!!!

Pretty sure buying fake fans is against FB TOS and you could risk losing your FB acct entirely ( I know a guy who lost his, 800,000+, probably 25,000-50,000 were real)
Fake likes imo are not worth it because you won't get the engagement when you post and it looks bad.
I would rather have 100 real fans that are qualified to buy products, than 1,000 fakes ones that do nothing.

Most probably would cost more to promote a post if they are fake, I pay $20 USD to reach my 12,000 real fans.

Good luck

Social sites don't drive traffic, I do 1,000 to make it look big and then let it grow naturally.