Hm. I always dislike people who try and push their thoughts on others that are just trying to do their own thing so every now and then I will spot someone standing outside a store or something preaching their beliefs(different than sitting with a sign or something and talking to those who come up to you and show an interest) and I just need to make their lives a little more difficult like they are doing for everyone else.
Generally this involves deciding on whatever is probably the least important aspect of what they are trying to share and argue it with them. I find this is far more frustrating to people than if you tried to disprove their thoughts.
For example, there was a guy out shouting about the pro-life movement and how terminating a pregnancy is murder, showing pictures of fetuses to people walking past and all that. Rather than talking the issue with him, which would probably just have given him satisfaction and wouldn't have done anything to change his mind even if I was properly researched and prepared I went up to him and explained that the name of their movement was wrong. I pointed out that there was no pro-life movement before the pro-choice movement started, so they were actually anti-choice. I wouldn't talk about whether I agreed or not with him on any of the issues, the morality of it, any of the things he kept trying to switch to. Instead I just stayed really insistent about the title and treated it like it was genuinely important to me that they had a misnomer. The guy actually stormed off and left, but right before he did I genuinely thought he was going to hit me.
Also, to the OP, creating a thread doesn't necessarily make you its god. A lot of memes are stupid. Very stupid. People like them though apparently and getting all riled about it just makes you look like a jerk, especially in a thread where you are trying to encourage people to find ways to annoy others. Just relax and you might find your days are a little better.