That's ridiculously stupid. What you're saying is the same as thinking that helmets don't do anything because you saw a guy with the dumb little harley helmet, or that you think cars suck because you read something bad about a pinto. Pro tip: it's not binary. Particle filtration is real and just because some idiot doesn't put any effort into it, has no bearing on whether or not particle filtration is real. The extra annoying part is that we all know you understand this principle just fine with other subjects you agree with, then take this fuckin ass backwards approach with just this one topic, you know...because you're like....super open minded and stuff.