The admin here takes a conservative stance on defederation. He doesn't do it unless there are lemm.ee rules violations or network abuse. I haven't looked at any explodingheads content, but if it does not violate any lemm.ee rules and presents no network abuse it will probably not get defederated.
I agree with lemm.ee's philosophy on defederation and that's one of the reasons this is my home instance. In general you can't call for defederation just because you don't agree with content. If it's blatantly offensive then I suppose that would be valid grounds, but I would hope that reason is used sparingly. I mean discussion that's offensive to you may not be offensive to me.