Dimension Door can be stopped if you gag the caster, but that's about it.
Also, back in my rework, Mister_Sinister posted the grappling section from Frank & K's Tomes. Take from it what you like.
[spoiler=F&K grapple]
Grapple
- Grab On
Sometimes, you want to attach yourself to a larger creature, getting inside their reach and then repeatedly
stabbing them or simply weighing them down. As an attack action you may attempt to grab on to an opponent.
Grabbing on to an opponent provokes an attack of opportunity and requires a check with the same bonuses as a
melee attack. The DC to grab on to an opponent is their Touch AC plus their BAB. If you have 5 ranks of Climb
or Ride, you get a +2 synergy bonus on this maneuver for each skill.
Holding on:Being Held on to:Edge Options: If you have the edge on an opponent when you grab them, they may not attack you at all once you have grabbed on to them. Further, grabbing on to an opponent does not provoke an attack of opportunity.
- Hold DownEscaping a Pin: Edge Options: - LiftEscaping a Lift:Edge Options: If you have the edge on an opponent you have lifted, they may not attack you or anyone else until they escape.
[/spoiler]
Also, here's a rough mechanic suggested by Zero_Sum in one of my threads:
[spoiler=Zero_Sum mechanic]Well, to start, I don't like rules that are of the form: Since your physical quality is [foo] you're only allowed this set of options, hence why I would throw out the gross requirement of one size larger to begin with.
How about something like this:
[Opposed Grapple Check to Damage]
If you win you get to do damage as a natural attack. You may substitute any one of your natural attacks for this including unarmed strike for humanoids and a monk's unarmed damage for monks.
The following effects are cumulative:
If you win by 5 or more you may add +1d6 damage.
If you win by 10 or more you may shake off your opponent from the grapple, forcing him to release the grapple and dealing +1d6.
If you win by 15 or more you may knock him down as well, forcing him to fall prone in the square he landed in.
The reason I didn't have it so you choose and get a modifier is because then it's too risky to try to do something. I think it's better to say "I attack" and have how well you attack be based on the result.[/spoiler]