Promotes stalling? You're using one of the characters that gets caught by this. DDD grabs you. You say, "I'll SD. Let me go." If they let you go, no stalling. If they don't let you go, DQ. I say that's giving you a lot if you had the misfortune or lack of sense to find yourself in this predicament.
I can list the characters that can deal with the SI. Obvious ones go to those that don't get hit by it. Some other obscure options include the rest of them by CPing a stage that discourages this type of play, such as RC, which means you are no longer risking getting "three grabs and you're out" because now they are placed at risk.
The two characters that are truly affected by it without some stupid dependence like where they are on the stage suddenly aren't brickwalled when they pick a stage to aid them with that.
Your opponent isn't helpless unless he's ********. It'd be stupid of me to challenge Falco on Japes, so how about I wait until I get somewhere that I know I have a chance at winning?
Don't bother with a video. You'd only do it to show that IDC is punishable in order to try and emphasize that Sis are nonpunishable, which is false if you simply pick a reasonable stage.
IDC isn't like grab infintes. As long as it's not spammed i don't give.
Define spamming. Actually, what are you gonna do if it's spammed in the sense that I'm thinking? How do you enforce "if, then" rules with this? It makes much more sense to ban it completely.