If I were to limit something, does that mean I could limit it to a state of non-existence or none? Like if someone limits your abilities to talk can that entail that they prevent you from talking altogether? Does limit entail any reduction of whatever noun that comes after it or any reduction with the exception of a complete reduction.
With quasi-real commodities such as money, zero amounts are possible. Thus a 'zero spending limit' is appliable.
According to Adrian B at Advertisercommunity.com:
Some banks configure the cards with a zero spending limit for internet unsecure transactions.
One could likewise limit one's time abroad to zero, though one would usually choose a more idiomatic way to express this.
However, limiting real spaces, amounts of material etc will not always be feasible below certain finite – er – limits.
Consider the definition of limit on Google:
limit: a restriction on the size or amount of something permissible or possible
If I were to put limits on your talking, at an all-day meeting I've organized, say, I could limit your talking to no more than one hour total, to no more than five minutes total, or to not talking at all -- because I just want you there to observe and take notes. One hour, five minutes, and no talking at all are perfectly fine limits. There is nothing about the definition of limit that rules out the "limiting case" of a complete prohibition.