With a tube cutter - dead square, no burrs and by its piercing action, rolls a slight radius on the end of tube. Excellent.
Hacksaw, notice the "Hack". - O.E.D. - to Mangle, to kick legs of opponent in football. --- WHAT !!!
The chrome will blunt the bade for starters which will then give burrs externally and internally.
More than likely to cut on the p---s requiring even more filing to rectify.
Nightmare in a Bubble Car.
Now who used to say that.