This post is confusing. You mean people who do nothing but grab? That's a horrible strategy. Throwing to stop someone from getting certain Supers though, that's pretty good.
No, it's incrediblly cheap and takes no skill. It's unblockable and unavoidable, and takes priority over every move in the game If you do it you've proven to be an awful player.
Have you tried not being in the generally area where they can grab you? That helps.
I like to make PSASBR move-sets. Here's a few:
Never say I don't contribute: I'm The Idea Man.
So basically your mad people use a move YOU don't like to use?
Move a long people. Nothing to see here.
Shut the hell up. People on hear complain about Kratos Sq, Drake Barrel, Radec Sniper, ect. all the time. Grabbing is unstoppable. Give me a counter, somebody please. Not being in their area is easier said than done. Grabbing over and over is 100% cheap.
Unforunately grab spam is difficult to deal with, but forunately, I don't see it often. The best defense is ranged attacks, and close ranged attacks immeadiately following a failed grab.
If there are other players in the arena, just avoid the grabber until they change their tactics. Also, supers always override a grab