Tantrums result in timeout here. I have zero tolerance for that sort of behavior. They must go sit in timeout until they are done. I do not acknowledge them while in timeout (tell them to quit etc). Most kids figure it out pretty quick and the tantrums stop. I had one boy though who was a nightmare and was excessively dramatic! Timeouts didn't work as well for him. I had to start being more creative. He didn't like being last at things so if he threw a tantrum then he would be last to go outside, last in line to wash hands, last one I gave lunch to etc.
I just feel there is no point in terminating a child for being difficult. I have yet to have a group without one "handful" so I might as well just keep the one I have already! Lol