As the title of the meme says "No reasonable person hopes that their side is responsible for this"
So, whether they're "lone wolves" or part of a group, if they're a reasonable human being then they don't behave that way.
In other words, if all it's going to take for some moron to set off a bomb is some "inspiration" from a meme then they were waaay too close to the edge to begin with. It could have been me, a slight breeze, or a feather that pushed them over the edge.