What's wrong with this?

They tend to try and give advice or tell people what it would be like to use or experience said firearms.

NDs especially friendly fire NDs.. Years ago at flagraiders outdoor drug lab a buddy of mine spit a burst of .25s from a TM glock 18c at my leg and cock.. Hurt like hell luckily had some slack in the pants so my leg go the grunt of it..

n00bs that think they have juggernaut armor like in COD that stand up and unload highcaps at targets 250-300ft away blowing hard earned flanking postion.. This of course with stock aegs that can't achieve the distance..

Back man not watching teams 6 causing a massive team slaughter then blaming someone else

People who refuse to believe that their gun will perform optimally unless their FPS is <1 lower than the field limit.

That doesn't sound like a "knowing too much" problem. I didn't think that the OP meant that, but I guess if other people are interpreting it that way, I didn't read into it properly.

Tactical Like....

Is there a spring that'll get my gun shooting 399.59999_ FPS? I don't want to be over field limits. Right now my gun is shooting 391 FPS, but I'm just not happy with its performance, and I think that extra FPS will be life changing.

well I am unhappy with my body and wish it could deliver way more fps.
I tried adding tactical cupcakes but it makes the whole damn thing harder to move.

I think they meant theoretical versus practical knowledge/experience. So for example, giving advice on how to shoulder a firearm when they've never fired before, versus knowing how to shoulder based on practical hands-on experience, which would hold more merit because the former doesn't have experience on the actual kick or anticipation of recoil. They claim to know practical experience, when it's really non-applicable theoretics they're trying to apply.

Speaking as a person whose never handled real steel, I would never give advice on the practical performance of operating one. It's one of those "too big for your breeches" things that makes you seem pretentious when you really don't know jack shit about the thing you're talking about.

Airsoft is another story.

And on the same topic, people who want sidearms that are shooting 400fps so they can "get as much range as a primary" with it.

*twitch*

In my defense, I had to take the protective spring guide washer off to get my M130 to shoot 419fps. I actually cannot make it shoot 410 =/

You are literally setting definition to the pet peeve.

PS. Why didn't you cut the spring and regrind the end? That washer prevents the spring from binding when compressed.

Yeah, but you're not some scrub who thinks adding 60fps to his cybergun thompson is gonna magically compete with my R hopped SR15 for range.

People who won't install a Polarstar in my R-hopped Gas PTW are currently annoying me.

The customer is always right; that's what people like about me.

I meant it as . . Guys that get all excited about real steal but have never fired a gun. It's like telling me how awesome the new Nissan 370z handles yet you've never driven a car.
I play airsoft because it's fun as he'll. Not because I get a bone while cleaning my gear. COD gun experts need not apply

Same difference... sort of.