Sure, but if the knife enthusiasts group is also promoting to you a “Slashing Children With Knives Enthusiasts” group, I think it’s worth criticizing.

And it is absolutely worth hiding from people who want to use it if the group in question is hosting pedophilia.

Speaking as a gay guy, there is an astroturf effort from the alt-right to try to paint the LGBT community as being so “inclusive” as to also include literal pedophiles, as if it’s just another sexuality or kink, and I’d rather prefer to nip that squarely in the bud by drawing a very hard line.