Maybe you do it, maybe you don't. Personally, I now refuse to like bands on Facebook -- even if it's a group I adore. While I could probably stack about a hundred reasons on top of my mighty throne of musical morality, let's start with a list of six reasons why I won't like your band on Facebook.
6. Facebook Extorts Money From Bands
I've always joked that if Google was going to take over the world, it would probably be a lot better than most of the corporations that currently run things. Seemingly, Google operates under the platform that what is good for the user is good for Google. While behind the scenes they may be running an clandestine operation designed to further the reptilian aliens through the suppression of fourth dimensional tryptamine gnomes, on the front end, they seem recognize that by serving their customers they will instill a loyalty that serves them.
Facebook, on the other hand, views their members as things to be exploited. Your sister's newly launched and still struggling cupcake bakery has been suckered into believing they need a Facebook page and with that, Facebook requires payment in order to allow their posts and updates to get to their subscribers -- the people they've asked to "like" their page and who have done so because they wish to support this business. And while showing people these updates actually helps Facebook by forcing you to flush more of your time on their network, it isn't enough. They want money. It isn't enough that you put in some effort to support their site by inviting people.
It's the same story with bands. And because people are still clinging to the absurd notion that being in a band is a viable way to earn money (it never was and never will be), Facebook still makes money the good ol' American way: by exploiting people's hopes and dreams. So unless you're part of this delusional constituency, why would I even bother liking your band on Facebook? As they restrict the reach of your posts, I'm unlikely to see them anyway. It does nothing.
5. I Can't Tell If I Actually Like It
Remember that two or three year period when Myspace was dying but was still a fairly useful site because you could listen to bands? It was a holy period in which you could hear virtually any artist, no matter how obscure, through the reliable and easily navigable Myspace music player. It was also, from a band perspective, far more useful. Clicking through a band's Top Eight and you can easily find a fistful of new music, already pre-approved by the band through which you learned about them. The 'Bulletins' feature, which served as a basic News Feed in which you decided whether or not you were interested in the status update by clicking the headline, was also vital in helping bands book tours. Myspace was stupid, but it was a good tool for bands.
Is there a music player on Facebook? Who knows. Could be. But evidently it sucks to the point where both you and your favorite bands can't find it.
More importantly, who cares, when you could be spending your time peering into the inner lives of former co-workers who you hate yet have always been strangely attracted to.
4. You Can Just Buy Facebook Likes
My friends' band, Much Worse, is excellent, but due to the fact that they play fairly intricate, hardcore punk, there isn't exactly a gigantic opportunity for them to roll around in piles of money and genitals. As a prank, I started using a website called Fiverr to purchase the group a ridiculous amount of Facebook likes from the country of Turkey. Going from 500 to 22,000 likes, the band believed they were spontaneously popular over in the crossroads of Europe and Asia. It also landed them the incredible opportunity to open for the band Green Jelly out in some suburban strip-mall, probably for an audience of 30 people. The promoter of the show incorrectly assumed that they were a huge band.
In other words, Facebook likes don't mean shit. If they were important, you couldn't just buy them.