Although there are trolls everywhere, sometimes the site you are in and the type of content may contribute to a higher or lower likelihood of encountering trolls. Which site was this if you don't mind me asking?
And as someone who deals with my fair share of irate, irritated and goading gamers online, I sometimes find that responding with humor helps relieve any upset I may be feeling from people's comments. Most of the time, not responding and blocking said people will suffice.