To be honest, if you really wanna tilt someone off, you gotta type on chatbox. But it's going to be extremely -EV over the long run, especially if you're a regular who grinds or consistently plays online.
Type the following after doing the following:
When you take someone's stack easily, such as set vs pair, type
"SHOW ME THE MONEY, WOOT WOOT"
When you suckout, type
"THAT'S WHAT I'M TALKIN ABOUT, BABY"
When you get your money in good and your hand holds up but your villain also hits their useless draw, such as set vs flush/straight draw where you make your boat and they make their flush/straight, type
"Well, at least you made your flush/straight "
When someone berates you after you take their chips, whether it be through bad play or not, type
"You know, better player always wins."(This one actually doesn't scare the fish away. It actually makes them reload and want to kick your ass and take your stack, hence might even be +EV, LMFAO)
I can guarantee you that these comments will really tilt people off. It won't tilt regulars who disable their chats or simply don't respond but yet, will write a note on you. But at microstakes, most people are fishes, hence, tilting them off. I honestly couldn't care less because I rarely play online, so there's no such thing called long run for me because when I do have time to play, I end up playing against different people because the people I previously played with, they're either not playing anymore because they went broke, they're recreational players who don't play often, or if they're good and regular players, which is rarely the case, they moved up the stake.