I try to buy ethically produced stuff when I can or shop at secondhand stores, but if the thing I need is only available in one place then I just buy the thing and don't worry about it. It's also a matter of what I can afford at the time. If you're really broke I think you get a pass on not buying expensive fair trade underpants or whatever.
I usually miss what's going on in social media, so don't get the chance to be swayed by it. I try to buy as ethically as I can, but sometimes I just get what I need because the shop is selling it for the right price.