The only Falcos I've played whom I think have the ICs match-up down decently well are DEHF, Mango, and post-December Zhu. I do feel that Falco has a hard time approaching ICs, and ICs do have plenty of low-risk, low-to-high reward options against him. Keep a blizzard in front of you decently often, shoot ice blocks sporadically, don't challenge his shield pressure if he's good at it and just roll/wavedash OoS backwards instead (unless he catches on, of course) , etc.
More generally speaking, doing this sort of thing at the very least tends to annoy your opponent and make him play worse. That's one of more valuable things I learned from the days when I regularly played P; lots of people get flustered when their opponent slows down the pace of the game and consequently play stupidly. There have been plenty of times when after beating someone, I've heard them comment afterwards that they weren't playing well or something along those lines, but frankly, I'd bet that the way I play is largely responsible for that.
My uniform and boring answer to everything *****.