Heh, yeah...I mean, when people talk about overinflated dice pools...I mean, IMO...the firearms adept that throws 16-18 is not overinflated. 20 means they took 6(+2), have an 8 Agility(optimized for what they do, yes), a couple levels in Firefight to help ease the in-close modifier and a smartlink. Thats 18 dice there. Move it to Agility 5(7), Firarms 5(+2) and a smartlink and it's an easy 16, and that's not even overly twinked.
But i mean...yeah. Pornomancers and their 30+ DPs...a liiittle bit out there.
But in the end, the buckets and buckets of DPs come from non combatants, 90% of the time. Due to the Agility limits and the extreme costs of maxing out Physical attributes, getting the genetech and the stats to surpass them, and then being an elf if you REALLY wanna squeeze every combat point out, and then not totally ditching other physical stats since you're a combat character, and then getting other ware to boost the whole lot of them, and then get the skills as high as you can...to get those massive, massive combat pools, it's a sight more expensive. (Adepts have improved ability, but it is of course twice as expensive as the non combat monkeys.)
The non combat monkeys, they have it easy to explode their dice. But really, in the end, i find before nerfs have to come into play, we deal with things 'gentleman's style'.
I ask ''please, for your face/stealth shadow ninja/Uber Fixit Techdude, don't make someone with a 35 DP to seduce or hide or build a bomb out of a tampon, a rubberband and shampoo.'' They ask me if 20 is fine. I have raptures that someone plays a social or stealth or fixit character with only 20 dice. I say yes. Problem solved and nothing had to be changed in the book.

but yeah, i know, sometimes, things can't always go that smooth.