Freezer is one of my favourite weapons . It is most useful in treasure as well as in battle. In treasure, I always use freezers. One can freeze his enemies and buttstomp them in order to collect his gems. Have you noticed treasure noobs waiting you at the end? Freezers can quickly make them frozen, so one can reach the end without being shot. In battle... In battle it can be used for buttstomping players while they are frozen or even shooting them. It is really annoying if you freeze someone, shoot him and run away.

According to me, TNT and PepperSpray are the most useless weapons.