Yep---I vote for the tube cutter too---been using one for many, many years and never crushed ashaft yet. Some people must be in a terrible hurry if they feel the need to exert that much pressure to cut a shaft. Also, I think many of the people who have that problem are probably unused to using tools of any sort.
Ever watch any of the "home improvement" shows on the DIY or H&G channels. They'll have people on there supposedly doing all kinds of serious work and it is obvious they don't even know how to hold the tools they're "using"---some of them are a scream.