Thanks got that, but what do these guys engineer them too? and Would they be good in PvE?
I imagine that they would certainly be Engineered. The rapid fire modification is probably the one preferred for ganking. Thermal Cascade probably the SFX of choice, because thermal weapons are extremely effective against unprepared players. A rack of them being drag munitions would also probably be fitted, to slow any escapes. Not being a PvPer, I'm not too sure.
What I *do* know is that they are lots of fun and that them moment 2.1 dropped and missiles were 'back in', I was gleefully dusting the dozen racks I have on stored Vipers and putting them on my ships, engineering, and quietly wondering just how long it would be before the PvP players started screaming blue murder about Swarm missiles with thermal cascade (Not long. The real whinging started a few weeks later, when it became a prevalent weapon).
Swarm missiles are very cool to use. Especially if you have multiple racks. It allows you to pretend to be a manga mech pilot firing a hundred missiles at once. They are the most *fun* weapon to use in PvE.
They also *wreck* external components and drives very well. If you can take someone's shields out and pop a rack full into their thrusters, they lose their thrusters. If you are facing a large, well armed vessel, then spraying it with a few racks will nicely reduce their firepower and defences by wrecking weapons and point defences. the sheer number of them overwhelms point defence systems. (I imagine that they might get boned completely by ECM). They are also fun when facing those with chaff if you use gimbals: Just switch to missiles and pop some at them. Especially fun as a stand-off weapon against fighters after you pop the shields.
For PvE the extended magazine option is my preferred modification, as it gives much more staying power compared to the otherwise fairly limited ammunition.
As far as downsides, they take a lot of power to run and create a LOT of heat, especially if used in multiples (which you should do, because FUN!). I now refer to the 'warning temperature critical' alarm my 'you just fired missiles' alarm. The heat issue is certainly something to consider. The other downside is the minimum arming distance and lock-on time, which makes them a poor weapon in a knife-fight with an agile ship - you need to back off to stand-off range.
Why there is no group (as the fuel rats) that can punish the gankers ?
Fuel Rats are not a PvP organisation. It would be like Shell going after the US army.
Ultimately, providing gankers with additional attention is slightly self-defeating. It gives them what they want, to a degree: Either a good fight, or attention which they can get a laugh out of simply by logging off and managing instancing so 'those idiots' intent on pursuing them are chasing vacuum. either way, they kind of win.
It's also hard to do because it requires rapid, defensive deployment to a quite large game-area, against foes who can move around in other modes and attack where they like, when they like, with no notice. It's possible for people to defend an area for a limited time, but serious ongoing operations are not very viable. Essentially, it's asymmetric and the ganky players have a massive operational advantage, in addition to generally being better motivated to do 'their' thing than the players engaged in defensive operations.