Everybody who is on the internet has probably heard of this term. Trolls or being trolled is fairly common. In fact there are sites such as 4chan where the sole purpose of the community is to troll on different activities.
Reddit is also one such community, where a lot of users are actively trolling and are being trolled. Being a long time lurker on Reddit, I used to read through multiple posts where fellow redditors would make hilarious comments (often to diffuse a situation). Funny, but at whose expense?