Is it possible to mod out screenshake?

I wish.

If I had found such a method, you could be damned sure I'd be making all kinds of noise about it. Fuck screenshake, shoot the guy who coded it, and violate the person who allowed him to put it in the game.

(I definitely don't use precision weapons, nope, not ever).

I would rather want a mod, that puts a modded sized reaper in the background like in the SP and screenshake my screen into my oblivion instead

Or a massive sized glacier hazard seeker swarm on every map along with it having Andrenaline module X speed attached to it. So it's a speedy seeker swarm.

Pfft.
Rather learn to live with it. It'll make you a damn good sniper.
Recently I was treated to a Venom Drell Assassin that was blowing his Recon Mine up every few damn seconds. I couldn't even get angry at him - I was sitting there laughing, completely powerless and deprived of any will to live.
Cluster 'nades, Multifrag 'nades, any 'nades in general, Shockwave, Snap Cheese (FFS! HAAAATE), Scorpion - all that is not an issue anymore. Bring it on, I won't care.
I guess I've reached my zen state as a Javelin sniper.

That's exactly what I do.
I remember being told that I was the first person seen to use the Javelin as a shotgun - that is, at point-blank range. Just run up to them and shoot them in their ugly faces. Sometimes even hipfire. Still works wonders, even with 50% damage cut.
Looks like I'm not the only one after all. Should've guessed.

I didn't think there was another way to snipe. SMG, sniper, shotgun, doesn't matter they all get used the same way anyway. You can't miss from point blank

BW is ideal for that. Javelin - not so much.