All 2st Can a rear shock "sieze"?

If you have already cut the bent end off you can drill out the center of the bolt so that it will collapse a little and can be driven out. All above suggestions are good too it just depends what tools are available to you.

hey firecrotch. i have a sawzall you can borrow if you want. i work at the MS campus if you want to come by and grab it let me know. i was thinking you were over that way so if it would work for you then let me know.

That bolt will have to be driven out with a hammer & punch or pressed out. Make sure it's done by someone that knows what they're doing so that the lower shock yoke and/or the rocker doesn't get damaged. Take out the shock & rocker as an assembly & work on it from there.
Cutting of the section of exposed bolt won't really do anything except to maybe make it a little easier to press the rest out depending what equipment you have access to. More than likely it's a waste of time.
After this is over, you'll need a new dog bone, shock bolt & nut, lower shock bushing & bearing and probably new seals/spacers while you're at it. It's also possible that the portion of the rocker that holds the lower shock bearing may be ovaled, or twisted - let's hope not.

Yeah, my brother the uber mechanic and former pro mx'er lectered me about just the same.